PLEASE ANSWER! Select the expression that makes the equation true.


one half x (3 x 5 + 1) – 2 = ___


4 x (2 + 3)

(4 x 3) ÷ 2

6 ÷ 3 + 2

6 + 8 ÷ 4

Answers

Answer 1

The expression that will make the given equation true when simplified is: B. (4 x 3) ÷ 2

How to Determine the Expression that Makes the Equation True?

To determine the expression that makes the equation true, simplify both sides of the equation and then compare them to the given options to identify the one that equals the simplified equation.

Let's simplify the left-hand side of the equation first:

1/2 * (3 * 5 + 1) - 2 = 1/2 * (15 + 1) - 2 = 1/2 * 16 - 2 = 8 - 2 = 6

Now we can check which expression equals 6:

4 * (2+3) = 4x5 = 20

(4x3) ÷ 2 = 12÷2 = 6

6 ÷ 3 + 2 = 2+2 = 4

6+8 ÷ 4 = 6 + 2 = 8

Therefore, the expression that makes the equation true is (4x3)÷2, which equals 6.

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Answer 2

Using Order of operations, the expression that makes the equation true is: (4 × 3) ÷ 2

How to use Order of operations?

The order of operations has an acronym which is PEMDAS. This acronym stands for: parentheses, exponents, multiplication, division, addition, then subtraction.

We are given the equation as:

¹/₂ × (3 × 5 + 1) - 2

Using order of operations, we use multiplication inside the bracket first to get:

¹/₂ × (15 + 1) - 2

We solve the bracket to get:

¹/₂ × 16 - 2

We use multiplication to get:

8 - 2 = 6

Looking at the given options, the only that gives same answer as the above is option B as seen below:

(4 × 3) ÷ 2

= 12 ÷ 2

= 6

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Related Questions

Simplify the expression. Enter the answer in the box. 3 2/5 + (-7 1/5) = 3 + (-7) + 2/5 + (-1/5)

Answers

I think this is right

Find the area of the shaded segment of the circle

Answers

The area of the shaded segment of the circle is calculated by substracting the area of triangle from area of sector of circle So, area of shaded segment of the above circle is equals to the (12π - 9√3) cm².

Assume a sector having a radius r and a central angle of α degrees. The sector's area will be A= (α/360∘)πr². Similarly, different shapes have different area formulas. We have been provided a circle of radius 6cm. Assume that its center is O and the segment is AB. Radius of circle , r = 6 cm

Central angle,α = 120°

Area of shaded segment is calculated by the area of sector AOB of circle minus area of triangle AOB formed there. So, Area of sector AOB , A = (α/360∘)πr²

= ( 120°/360°) π6²

= (1/3) 36π = 12π cm²

As we know, OA = OB= 6cm

=> m∠OAB = m∠OBA

and m∠AOB + m∠OAB + m∠OBA = 180∘

=> 120∘ + m∠OAB + m∠OAB= 180∘

=> 2(m∠OAB) = 180∘− 120∘ = 60°

=> m∠OAB = 30° = m∠OBA

So, it is an isosceles triangle. Draw a perpendicular OC on AB then there is formed two right angled triangles. In right angled triangle OAC, 90°, 60°, 30° and OA = 6 cm then OC/6 = Sin 30°

=> OC= 3 cm and

AC = √36 - 9 = √27 = 3√3 cm

Similarly, BC = 3√3 cm so, AB = 6√3 cm. Now, area of triangle AOB = (1/2) × AB × OC = (1/2)× 6√3 ×3 = 9√3 cm²

So, required area = 12π cm² - 9√3 cm². Hence, required value is (12π - 9√3) cm².

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Complete question:

The above figure completes the question. Find the area of the shaded segment of the circle.

Find the area of the shaded polygon.

Answers

To find the area of the shaded polygon, we had to assume that each dotted line was one unit. In which case, the coordinates are:

A(1,4)B (5,6)C (6, 3)D (3, 2)

Hence, the area of the polygon is A [tex]\approx[/tex] 11.15 units.

What is the explanation for the above response?


To get the area of the polygon, we must determine the length of all it's sides.

a) A-B is given by the distance formula:

distance = √((x2 - x1)² + (y2 - y1)²)

where (x1, y1) and (x2, y2) are the coordinates of the two points.

Using this formula, we can calculate the distance between points A(1,4) and B(5,6) as follows:

distance = √((5 - 1)² + (6 - 4)²)

= √(16 + 4)

= √(20)
A-B = 4.47213595

A-B [tex]\approx[/tex] 4.47

b)
To find B-C we use the same method:
B-C = 3.16 units.

c)
To find C- D we use the same method:
C- D  [tex]\approx[/tex] 3.16 units.

d) to find D-A  we use the employ the same method:
D - A [tex]\approx[/tex] 2.83



Since this is an irregular quadrilateral, we will require the use of the
length of one of it's diagonals which is also computed using the distance formula to get: 4.47 Units.


Calculate the perimeter of ABCD

Perimeter of ABCD = AB + BC + CD + AD

Perimeter of ABCD = 4.4721359549996 + 3.1622776601684 + 3.1622776601684 + 2.8284271247462

Perimeter of ABCD = 13.625118400083


Calculate the semi-perimeter (s) of ABCD

s  =   Perimeter ÷ 2

s  =   13.625118400083 ÷ 2

s = 6.8125592000413


Calculate the Area (A) using Brahmagupta's Formula

A = √[(s - a)(s - b)(s - c)(s - d)]

A = √(6.8125592000413 - 4.4721359549996)(6.8125592000413 - 3.1622776601684)(6.8125592000413 - 3.1622776601684)(6.8125592000413 - 2.8284271247462)

A = √(2.3404232450417)(3.6502815398729)(3.6502815398729)(3.9841320752951)

A = √(124.24555320337)
A = 11.14654893693

A [tex]\approx[/tex] 11.15 units.

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the probability of a potential employee passing a drug test is 90%. if you selected 11 potential employees and gave them a drug test, how many would you expect to pass the test?

Answers

The required expected number of employees who will pass the test from given 11 potential employees is equal to 10.

Probability of passing a drug test is 90%,

Then the probability of failing is 10%.

For each potential employee,

Probability of passing is 0.9, and the probability of failing is 0.1.

The number of potential employees who would be expected to pass the test,

Calculated using the binomial distribution with n = 11 and p = 0.9.

P(A = x) = (ⁿCₓ) × pˣ ×  (1-p)ⁿ⁻ˣ

where,

A is the number of potential employees who pass the test

x is the number of potential employees who pass the test

n is the number of potential employees

p is the probability of passing the test

Using this formula, the expected number of potential employees who would pass the test is,

E(A) = n ×p

      = 11 × 0.9

      = 9.9

Rounding to the nearest whole number, we can expect 10 potential employees to pass the test.

Therefore, the expected number of employees from the given  probability who would pass the the test is 10.

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A boat is heading towards a lighthouse, where Tyee is watching from a vertical
distance of 115 feet above the water. Tyee measures an angle of depression to the boat
at point A to be 15°. At some later time, Tyee takes another measurement and finds
the angle of depression to the boat (now at point B) to be 50°. Find the distance from
point A to point B. Round your answer to the nearest foot if necessary.

Answers

In the given problem,  the distance from point A to point B is approximately 658 feet (rounded to the nearest foot).

How to Calculate the Distance?

Let's define some variables:

Let h be the height of the lighthouse (given as 115 ft).Let d be the distance from Tyee to point A.Let x be the distance from Tyee to point B.

Using trigonometry, we can write the following equations:

For triangle ACT, we have:

tan(15°) = h/d

For triangle BCT, we have:

tan(50°) = h/(d+x)

We want to find the value of x, so let's rearrange the second equation:

tan(50°) = h/(d+x)

tan(50°)*(d+x) = h

d+x = h/tan(50°)

x = h/tan(50°) - d

Substituting the given values:

x = 115/tan(50°) - d

Now we need to find the value of d. For that, we can use the first equation:

tan(15°) = h/d

d = h/tan(15°)

Substituting the given value:

d = 115/tan(15°)

Now we can substitute both values into the equation for x:

x = 115/tan(50°) - 115/tan(15°)

Using a calculator, we get:

x ≈ 658.4 ft

Therefore, the distance from point A to point B is approximately 658 feet (rounded to the nearest foot).

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Amari gathered a random sample of oranges in her town. She calculated data on different variables. For one of the variables that she collected, she constructed a bar graph.

Which of the following variables did she use?

Type of orange
Diameter of the oranges
Number of navel oranges
Price per pound of oranges

Answers

"type of orange" because it is a bar graph therefore it is supposed to be categories, not numbers :)

Work out he area of this circle. Take pi to be 3. 142 and give your answer to 1 decimal place

Answers

The area of circle with radius 4 centimetres and the special math constant, pi to be 3. 142 is equals to the 50.3 cm².

Area of a shape is defined as the total spece covered by shape in two-dimensional. In geometry, the area enclosed circle is calculated by π times the square of radius of circle. Formula of Area = π × r², where 'r' is the radius. The units of area are square of units of radius that if radius in feet then unit of area will be square feet. We have a circle with radius say r = 4 cm.

The value of specific math constant, pi ( i.e., π) is equals to be 3.142. We have to determine the area of circle. The area of circle, A = π× 4²

=> A = 16π

=> A = 16× 3.142

=> A = 50.272 ~ 50.3 cm²

Hence, the required area value is 50.3 cm².

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Complete question:

The above figure completes the question.

Work out he area of this circle. Take pi to be 3. 142 and give your answer to 1 decimal place

Please Answer!!

After t years, the rate of depreciation of a car that costs $20,000 is 25%. What is the
value of the car 2 years after it was purchased?

Answers

[tex]\qquad \textit{Amount for Exponential Decay} \\\\ A=P(1 - r)^t\qquad \begin{cases} A=\textit{current amount}\\ P=\textit{initial amount}\dotfill &20000\\ r=rate\to 25\%\to \frac{25}{100}\dotfill &0.25\\ t=\textit{elapsed time}\dotfill &2\\ \end{cases} \\\\\\ A = 20000(1 - 0.25)^{2} \implies A=20000(0.75)^2\implies A = 11250[/tex]

The distance from Sunderland to Wigan is 150 miles.
Mollie leaves Sunderland in her car at 07:50.
Her average speed on the journey is 60mph.
What time does she arrive in Wigan?

Answers

To calculate the time Mollie arrives in Wigan, we need to use the formula:

time = distance / speed

In this case, the distance is 150 miles and the speed is 60 mph. Substituting these values in the formula, we get:

time = 150 / 60
time = 2.5 hours

So, it will take Mollie 2.5 hours to travel from Sunderland to Wigan at an average speed of 60 mph.

If she leaves Sunderland at 07:50, and it takes 2.5 hours to get to Wigan, then she will arrive at:

07:50 + 2.5 hours = 10:20

Therefore, Mollie will arrive in Wigan at 10:20.

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7 divided by 70.85 show work

Answers

7 divided by 70.85 would be

0.098800282286521

if you meant 70.85 divided by 7 it would be

10.12142857142857

If a company understates its ending balance of inventory in year 1 and states its inventory correctly in year 2, which one of the following is true?a. Net income is overstated in year 1.b. Cost of goods sold is understand in year 2.c. Net income is understated in year 2.d. Retained earnings is understood in year 2.

Answers

If a company understates its ending balance of inventory in year 1 and states its inventory correctly in year 2, then the correct statement is option (c) Net income is understated in year 2

Understating the ending balance of inventory in year 1 would result in the cost of goods sold (COGS) being overstated and net income being understated in that year. This is because the COGS is calculated as the beginning inventory plus purchases minus ending inventory. By understating the ending inventory balance, the COGS for year 1 would be overstated, which would result in a lower net income for year 1.

In year 2, if the inventory is stated correctly, it would not have an impact on the COGS for that year. However, if the net income for year 1 was understated due to the understated ending inventory balance, the cumulative effect would be an understated net income for both years. This means that the correct answer is c. Net income is understated in year 2.

Therefore, the correct option is (c) Net income is understated in year 2

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Find dy/dx for y=4sin²(3x)

Answers

Answer:

24 sin(3x) cos(3x)

Step-by-step explanation:

To find:-

The derivative of y = 4sin²(3x) .

Answer:-

The given function to us is ,

[tex]:\sf\implies y = 4sin^2(3x) \\[/tex]

To find it's derivative we would have to use Chain rule of differentiation , which is ;

[tex]:\sf\implies \pink{ \dfrac{dy}{dx}=\dfrac{dy}{du}\cdot \dfrac{du}{dx}} \\[/tex]

Taking the given function,

[tex]:\sf\implies y = 4sin^2(3x) \\[/tex]

Differentiate both sides with respect to x,

[tex]:\sf\implies \dfrac{dy}{dx}=\dfrac{d}{dx}4sin^2(3x)\\[/tex]

We can take out the constant as ,

[tex]:\sf\implies \dfrac{dy}{dx}= 4 \dfrac{d}{dx}sin^2(3x) \\[/tex]

Multiply and divide by sin(3x) as ,

[tex]:\sf\implies \dfrac{dy}{dx}= 4 \bigg( \dfrac{d(sin^23x)}{d(sin3x)}\times \dfrac{d\ sin3x}{dx}\bigg)\\[/tex]

Differentiation of sin(nx) is n cos(nx) and

[tex]:\sf\implies \pink{ \dfrac{d(x^n)}{dx} = nx^{n-1} }[/tex]

So that ,

[tex]:\sf\implies \dfrac{dy}{dx}= 4 ( 2sin(3x) \cdot 3cos(3x))\\[/tex]

Simplify,

[tex]:\sf\implies\pink{ \dfrac{dy}{dx}= 24\ sin(3x) \ cos (3x)}\\[/tex]

Hence the derivative of the given function is 24 sin(3x) cos(3x) .

[tex]\rule{200}2[/tex]

Related formulae :-

[tex]\boxed{\boxed{\begin{minipage}{5cm}\displaystyle\circ\sf\;\dfrac{d}{dx}(sin\;x)=cosx \\\\ \circ \;\dfrac{d}{dx}(cos\;x) = -sinx \\\\ \circ \; \dfrac{d}{dx}(tan\;x) = sec^{2}x \\\\ \circ\; \dfrac{d}{dx}(cot\;x) = -csc^{2}x \\\\ \circ \; \dfrac{d}{dx}(sec\;x) = secx \cdot tanx \\\\ \circ \; \dfrac{d}{dx}(csc\;x) = -cscx \cdot cotx \\\\ \circ\; \dfrac{d}{dx}(sinh\;x)=coshx \\\\ \circ\; \dfrac{d}{dx}(cosh\;x)= sinhx \\\\ \circ\;\dfrac{d}{dx}(tanh\;x)=sech^{2}h \\\\ \circ\;\dfrac{d}{dx}(coth\;x)=-csch^{2}x \\\\ \circ\;\dfrac{d}{dx}(sech\;x) =-sechx \cdot tanhx \\\\ \circ\;\dfrac{d}{dx}(csch\;x) = -cschx \cdot cothx\end{minipage}}}[/tex]

[tex]\rule{200}2[/tex]

Answer:

[tex]\dfrac{\text{d}y}{\text{d}x}=12 \sin (6x)[/tex]

Step-by-step explanation:

To find the derivative of y = 4sin²(3x), use the chain rule.

[tex]\boxed{\begin{minipage}{5.4 cm}\underline{Chain Rule for Differentiation}\\\\If $y=f(u)$ and $u=g(x)$ then:\\\\$\dfrac{\text{d}y}{\text{d}x}=\dfrac{\text{d}y}{\text{d}u}\times\dfrac{\text{d}u}{\text{d}x}$\\\end{minipage}}[/tex]

The given function can be written as:

[tex]y=4(\sin 3x)^2[/tex]

Let y = 4u², where u = sin(3x).

Differentiate the two parts separately.

[tex]\dfrac{\text{d}y}{\text{d}u}=8u \quad \text{and} \quad \dfrac{\text{d}u}{\text{d}x}=3 \cos (3x)[/tex]

Put everything into the chain rule formula:

[tex]\begin{aligned} \implies \dfrac{\text{d}y}{\text{d}x}& =\dfrac{\text{d}y}{\text{d}u}\times\dfrac{\text{d}u}{\text{d}x}\\\\&=8u \times 3 \cos (3x)\\\\&=24u \cos (3x)\\\\&=24 \sin (3x) \cos (3x) \end{aligned}[/tex]

Simplify using the sine double angle identity:

[tex]\boxed{\sin (2 \theta)= 2 \sin \theta \cos \theta}[/tex]

[tex]\begin{aligned} \implies \dfrac{\text{d}y}{\text{d}x}&=24 \sin (3x) \cos (3x) \\\\&=12(2 \sin (3x) \cos (3x))\\\\&=12 \sin (2 \cdot 3x)\\\\&=12 \sin (6x)\end{aligned}[/tex]

Therefore:

[tex]\dfrac{\text{d}y}{\text{d}x}=12 \sin (6x)[/tex]

[tex]\hrulefill[/tex]

Differentiation Rules

[tex]\boxed{\begin{minipage}{5.8 cm}\underline{Differentiating $ax^n$}\\\\If $y=ax^n$, then $\dfrac{\text{d}y}{\text{d}x}=nax^{n-1}$\\\end{minipage}}[/tex]

[tex]\boxed{\begin{minipage}{5.8 cm}\underline{Differentiating $\sin (ax)$}\\\\If $y=\sin(ax)$, then $\dfrac{\text{d}y}{\text{d}x}=a \cos (ax)$\\\end{minipage}}[/tex]

Which of the following is a TRUE statement about hypothesis testing?
A: If there is sufficient evidence to reject a null hypothesis at the 10% level, then there is sufficient evidence to reject it at the 5% level.
B: Whether to use a one-sided or a two-sided test is typically decided before the data are gathered.
C: If a hypothesis test is conducted at the 1% level, there is a 1% chance of rejecting the null hypothesis.
D: The probability of a Type I error plus the probability of a Type II error always equals one.
E: The power of a test concerns its ability to detect a null hypothesis.

Answers

If there is sufficient evidence to reject a null hypothesis at the 10% level, then there is sufficient evidence to reject it at the 5% level.

What is hypothesis testing?

A statistical hypothesis test is a technique for determining if the available data are sufficient to support a specific hypothesis. We can make probabilistic claims regarding population parameters through hypothesis testing.

Here,

We have to find the correct statement about hypothesis testing.

We concluded that  If there is sufficient evidence to reject a null hypothesis at the 10% level, then there is sufficient evidence to reject it at the 5% level.

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Answer:

In this case, B is true.

Whether to use a one-sided or a two-sided test is typically decided BEFORE the data are gathered, not after.

Be careful while reading the options on the quiz, because depending on the question you get, the options may be worded slightly differently. Because of the wording, the answer may be different as well (on the FLVS quiz, I got different answer choices for this question). Be careful and read cautiously!

Have a great day.

In the figure DB bisects

Answers

So, the measure of angle B is 90 degrees.

What is angle?

An angle is a geometric figure formed by two rays or line segments that share a common endpoint, called the vertex. The two rays or line segments are called the sides or arms of the angle. Angles are typically measured in degrees or radians, and they are used to measure the amount of rotation between two lines or planes. A full rotation is 360 degrees or 2π radians, while a half rotation is 180 degrees or π radians. Angles play an important role in geometry, trigonometry, physics, engineering, and many other fields of science and mathematics.

by the question.

To find the measure of angle B, you need to use the fact that angle DB bisects angle ADC. This means that angle ADB and angle CDB are congruent, or have the same measure. So you can set the measure of angle ADB equal to the measure of angle CDB and solve for x.

Once you have found the value of x, you can substitute it into either equation for angle ADB or angle DBC to find the measure of that angle. Finally, since angle B is an exterior angle of triangle ADB, its measure is equal to the sum of the measures of angles ADB and DBC.

So, the steps to find the measure of angle B are:

Set the measure of angle ADB equal to the measure of angle CDB:

(3x - 12) = (2x + 6)

Solve for x:

x = 18

Substitute x = 18 into either equation for angle ADB or angle DBC to find the measure of that angle:

angle ADB = (3x - 12) = (318 - 12) = 48 degrees

angle DBC = (2x + 6) = (218 + 6) = 42 degrees

Find the measure of angle B as the sum of the measures of angles ADB and DBC:

angle B = angle ADB + angle DBC = 48 + 42 = 90 degrees.

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f(x) = 16, x = *
f(x) = x² - 6x + 9
Multiple choice: Finding: x values
-7
7
1
-1​

Answers

The values of the variable x are 7 and -1. Options B and D

What are functions?

Functions are simply defined as those equations, expressions or laws that shows the relationship between two variables.

These variables are;

The independent variablesThe dependent variables

From the information given, we have that;

f(x) = 16

f(x) =  x² - 6x + 9

Now, equate the two functions, we have;

x² - 6x + 9 = 16

collect the like terms

x² - 6x + 9 - 16 = 0

subtract the values

x² - 6x - 7 = 0

solve the quadratic equation

x² - 7x + x - 7 = 0

x(x - 7) + 1( x - 7)

Then, x = 7 and -1

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Dion brought $35.75 to the state fair. He bought a burger, a souvenir, and a pass. The burger was
1/6 as much as the souvenir, and the souvenir cost 3/4 the cost of the pass. Dion had $2.00 left over after buying these items. What was the cost of each item?

Answers

The burger costs $0.625, the souvenir costs $3.75, and the pass costs $5.00.

What was the cost of each item?

Let's name the burger price "b," the souvenir price "s," and the pass price "p." Then, using the information provided, we can construct an equation system:

b + s + p = 35.75  (1) (The three things cost a total of $35.75.)

b = (1/6)s               (2) (the burger was one-sixth the price of the memento).

s = (3/4)p     (3) (the memento cost one-quarter the price of the pass)

b + s + p + 2 = 35.75       (4) (After purchasing these products, Dion had                        $2.00 left over.)

To remove s from the equations, we can apply equations (2) and (3):

b + (3/4)p + p = 35.75    (equations (1) and (3))

b = (1/6)(3/4)p                (Applying Equation (2))

b = (1/8)p

This expression can now be substituted by Input b into equation (1):

(1/8)p + (3/4)p + p = 35.75

(7/8)p = 35.75

p = 35.75 / (7/8)

p = $5.00

We may calculate the cost of the keepsake using equation (3):

s = (3/4)p = (3/4)($5.00) = $3.75

Finally, we can calculate the cost of the burger using equation (2):

b = (1/6)s = (1/6)($3.75) = $0.625

As a result, the burger costs $0.625, the souvenir costs $3.75, and the pass costs $5.00.

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the masses, in grams, of ten ball bearings taken at random from a batch are: 25.9, 24.7, 23.4, 24.5, 25.0, 26.9, 26.4, 25.8, 23.2, 21.9. calculate a 95% confidence interval for the mean mass of the population, supposed normal, from which these masses were drawn? what is x2, the upper limit of the 95% confidence interval? enter your answer rounded to two decimal places. for example, if your answer is 12.345 then enter as 12.35 in the answer box.

Answers

The 95% confidence interval for the mean mass of the population is 24.57 ± 1.06. The upper limit of the 95% confidence interval is 25.63.

Given the masses, in grams, of ten ball bearings taken at random from a batch are: 25.9, 24.7, 23.4, 24.5, 25.0, 26.9, 26.4, 25.8, 23.2, 21.9

We have to calculate a 95% confidence interval for the mean mass of the population, supposed normal, from which these masses were drawn.The formula for the Confidence Interval is given by,

CI = X bar± tα/2 * (s/√n)

Where,

CI = Confidence Interval

Xbar = Sample mean

tα/2 = α level of significance/2 (α is the level of significance)

s = sample s

tandard deviationn = sample size

tα/2 = t-distribution value for α/2 and (n-1) degrees of freedomtα/2 for α = 0.05 and (n-1) degrees of freedom

tα/2 = 2.262

Hence,CI = X bar ± tα/2 * (s/√n)

CI = 24.94 ± 2.306 * (1.618/√10)

CI = 24.94 ± 1.36

Upper limit of 95% confidence interval

x2 = 24.94 + 1.36= 26.30

Rounded off to two decimal places, x2 is 26.30.

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A pyramid and a coke have the same base, area, slant height, and surface area. If the perimeter of the base of the pyramid is 314 centimeters, what is the radius of the cone

Answers

If the perimeter of the base of the pyramid is 314 centimeters, then radius of the cone is approximately 17.44 centimeters.

What is perimeter?

Perimeter is a measurement of the distance around the outside of a two-dimensional shape. It is the sum of the lengths of the shape's sides.

Since the pyramid and cone have the same base and slant height, they are similar geometric figures. Therefore, their corresponding dimensions are proportional. Let's denote the radius of the cone as r.

Since the perimeter of the base of the pyramid is 314 centimeters, and the base of the pyramid is a square, we can find the length of one side of the square base by dividing the perimeter by 4:

Length of one side = Perimeter / 4 = 314 cm / 4 = 78.5 cm

Since the pyramid and the cone have the same area of the base, and the base of the pyramid is a square, we can find the area of the base by squaring the length of one side:

Area of the base = (Length of one side)² = (78.5 cm)²= 6,152.25 cm²

Since the pyramid and the cone have the same surface area, we can use the formula for the surface area of a cone to find the radius of the cone:

Surface area of the cone = πr(r + l), where l is the slant height.

The surface area of the cone is equal to the surface area of the pyramid, so we have:

πr(r + l) = 2 × Area of the base + Perimeter × l

Substituting the known values, we get:

πr(r + 13) = 2 × 6,152.25 cm² + 314 cm × 13 cm

Simplifying and solving for r, we get:

πr² + 13πr - 4,059.5 = 0

Using the quadratic formula, we find:

r ≈ 17.44 cm (rounded to two decimal places).

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Wants to buy new boots that cost $68. The sales tax rate in her city is 5-%. What is the total cost for the boots

Answers

Emily new boots cost a total of $71.4 with the tax included as 5% and the original cost of the boots being $68.

The sales tax rate in Emily's city = 5% and the cost of Emily's new boots is $68

we need to find the amount of sales tax Emily will pay for her boots,

The formula we will use =

Sale tax = Percent sales tax x Cost of the product

when we put the values in the formula, we get:

Sales tax = 5% x $68

= $3.4

now we need to also calculate the total cost for Emily's boots,

Therefore, the total cost = Cost of boots + Sales Tax

when we put the values in the formula, we get:

Total cost = $68 + $3.4

= $71.4

Therefore, the total cost Emily will pay for her boots is $71.4

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3×+9×=6×+42 solve for ×​

Answers

Answer:

x=7

Step-by-step explanation:

First, try to bring all your X's together

3x+9x=6x+42

   12x=6x+42

   -6x  -6x

    6x=42

    /6   /6

     x = 7

A researcher looking for evidence of extrasensory perception (ESP) tests 1000 1000 subjects. Nine of these subjects do significantly better ( P < 0.01 ) (P<0.01) than random guessing.
(a) Nine subjects may seem like a lot of people, but can you conclude that these nine people have ESP? Select the appropriate statement that explains whether or not it is proper to conclude that these nine people have ESP.
Yes. This follows directly from the 1 % 1% significance level.
Yes. This follows directly from the statistical significance.
No. Since the tests were performed at the 1% significance level, as many as 10 subjects may have done significantly better than random guessing.
No. The sample size was not large enough for any statistical inference.

Answers

it is important to note that the sample size of 1000 subjects is large enough for statistical inference, but the significance level must be taken into account when interpreting the results.

No. Since the tests were performed at the 1% significance level, as many as 10 subjects may have done significantly better than random guessing.

When conducting hypothesis testing, the significance level (in this case, 0.01 or 1%) is the probability of rejecting the null hypothesis when it is actually true. This means that there is a 1% chance of observing a significant result purely by chance, even if the null hypothesis (in this case, that the subjects do not have ESP) is true.

In this scenario, nine subjects performed significantly better than random guessing, which may suggest that they have ESP. However, due to the possibility of observing significant results by chance, it is not proper to conclude that these nine people have ESP. There is still a chance that these results are purely coincidental.

Additionally, it is important to note that the sample size of 1000 subjects is large enough for statistical inference, but the significance level must be taken into account when interpreting the results.

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1. A car's speed increases as it merges onto a highway. The car travels at 65 mph on the highway until it slows to exit. The car then stops at three traffic lights before reaching its destination. Draw a sketch of a graph that shows the car's speed over time.​

Answers

Just make a flat line for each time the car stops.

Hope this helps.

during a football game,the ball is placed 20 yards 2 feet from the goal line.How many feet from the goal line is the football.

Answers

There are 3 feet in 1 yard, so we can convert the 20 yards 2 feet to feet by multiplying 20 by 3 and adding 2:

20 yards 2 feet = (20 x 3) feet + 2 feet = 60 feet + 2 feet = 62 feet

Therefore, the football is 62 feet from the goal line.

Addison wanted to know if there was a connection between her coffee consumption and how
well she slept that night. For weeks, Addison recorded how many cups of coffee she drank in
the morning and how many hours she slept that night.
0 cups of coffee
1 cup of coffee
6 hours 7 hours
1
5
5
4
What is the probability that a randomly selected day is one when she drank exactly 1 cup of
coffee and is one when she slept about 6 hours?
Simplify any fractions.

Answers

Answer:

Step-by-step explanation:

If a shoe size of 4 is added to the data, how does the median change?
The median stays 6.5.
The median decreases to 6.5.
The median stays 6.75.
The median decreases to 6.75.

Answers

Answer: The median decreases to 6.5.

Step-by-step explanation:

The median before 4 was added was 6.75.

When 4 is added the median is 6.5.

All exponential functions can be written in many forms. Write the function
F(t)=9100(1.15)^t in the form
f(t)=ae^kt
Round all coefficients to four decimal places.

Answers

In conclusion Rounding to four decimal places, we get:

f(t) = 9100e²(0.1398t)

How to solve?

To write the function F(t) = 9100(1.15)²t in the form f(t) = ae²(kt), we need to first take the natural logarithm of both sides:

ln(F(t)) = ln(9100(1.15)²t)

ln(F(t)) = ln(9100) + ln(1.15²t)

ln(F(t)) = ln(9100) + t × ln(1.15)

Now, we have the form ln(F(t)) = ln(a) + kt, where k = ln(1.15) and a = 9100. We can exponentiate both sides of this equation to get:

F(t) = e²(ln(a) + kt)

F(t) = e²ln(a) × e²(kt)

F(t) = a × e²(kt)

Substituting the values of a and k, we get:

F(t) = 9100 × e²(0.1398t)

Rounding to four decimal places, we get:

f(t) = 9100e²(0.1398t)

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Please help with this question.​

Answers

Where the above mean exist, the values of x and y  are 10.5 and 3.5 respectively.

What is the explanation for the above response?

The total number of people surveyed is 24. So we can write:

Frequency of 0 sisters + Frequency of 1 sister + Frequency of 2 sisters + Frequency of 3 sisters = Total frequency

5 + x + 5 + y = 24

x + y = 14 --- (1)

Also, we know that the mean number of sisters is 1.25. This means that the total number of sisters divided by 24 should be equal to 1.25. So we can write:

0 × 5 + 1 × x + 2 × 5 + 3 × y = 1.25 × 24

x + 3y = 21 --- (2)

Now we have two equations (1) and (2) with two variables (x and y). We can solve for x and y by simultaneous equations.

Multiplying equation (1) by 3, we get:

3x + 3y = 42 --- (3)

Subtracting equation (2) from equation (3), we get:

2x = 21

x = 10.5

Substituting the value of x in equation (1), we get:

10.5 + y = 14

y = 3.5

Therefore, the values of x and y are 10.5 and 3.5 respectively.

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A standard size golf ball has a diameter of 1. 680 inches. The material used to make the golf balls weighs 0. 6523 ounces per cubic inch. What is the weight, to the nearest hundredth of an ounce of one golf ball

Answers

The volume of a standard size golf ball can be calculated using the formula for the volume of a sphere:

V = (4/3)πr^3

where r is the radius of the golf ball. The diameter of the golf ball is 1.680 inches, so the radius is 0.840 inches.

V = (4/3)π(0.840)^3

= 2.468 in^3

The weight of the golf ball can be calculated by multiplying its volume by the density of the material:

W = V × D

where D is the density of the material. The density of the material is 0.6523 ounces per cubic inch.

W = 2.468 in^3 × 0.6523 oz/in^3

= 1.6095 oz

Therefore, the weight of one golf ball is approximately 1.61 ounces (rounded to the nearest hundredth of an ounce).

If two angles of a triangle are congruent to the corresponding angles of a second triangle,
then the third angle of the first triangle is congruent to the third angle of the second
triangle.
A. True
B. False

Answers

Answer:

A. True

Step-by-step explanation:

If two angles of a triangle are congruent to the corresponding angles or the second triangle than the third angles must be congruent to each other.

The sum of the interior angles of a triangle is 180.  Let's say 2 angles to one triangle is 100 and the second angle is 35.  That forces the third angle to be 45 (100 + 35 + 45 = 180)

Helping in the name of Jesus.

Answer:

A. True

Step-by-step explanation:

In congruent triangles...All angles and sides have to be equal.

Solve the radical equation.

negative 5 square root of 2 x minus 1 end root equals space minus 15

Answers

The sοlutiοn tο the  radical equatiοn is x = 5.

What is radical equatiοn?

In mathematics, a radical is the οppοsite οf an expοnent, which is symbοlised by the symbοl "," alsο referred tο as rοοt. A square rοοt οr a cube rοοt can be used, and the number befοre the symbοl οr radical is regarded as an index number οr degree. The expοnent οf this number cancels the radical and is a whοle number.

What is the basic arithmetic οperatiοns?

The fοur basic mathematical οperatiοns are Additiοn, subtractiοn, multiplicatiοn, and divisiοn.

Starting with:

-5√(2x - 1) = -15

Divide bοth sides by -5:

√(2x - 1) = 3

Square bοth sides:

2x - 1 = 9

Add 1 tο bοth sides:

2x = 10

Divide bοth sides by 2:

x = 5

Hence, the solution to the equation is x = 5.

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