23. Without using a calculator, evaluate the following expressions. Show your substitutions. a. Substitutex=4into the expressionx−2b. SubstituteB=−5into the expressionB−2c. Substitutew=−2into the expression−w−4d. Substitutey=−3into the expression(y)4e. Substitutet=4into the expression−t2f. SubstituteR=−10into the expression−R−3

Answer:

Aquí hay tres situaciones en las que se hace necesario el uso de números negativos:

Temperaturas: Las temperaturas pueden ser positivas o negativas, dependiendo de si estamos midiendo la temperatura por encima o por debajo del punto de congelación del agua. Por ejemplo, si la temperatura es de -10°C, significa que hace 10 grados bajo cero.

Deudas: Cuando una persona toma un préstamo o usa una tarjeta de crédito, puede acumular una deuda que debe ser pagada en el futuro. Esta deuda se representa con un número negativo, ya que representa el dinero que se debe.

Altitud: Cuando se mide la altitud de un lugar, puede ser por encima o por debajo del nivel del mar. Si la altitud es por debajo del nivel del mar, se representa con un número negativo. Por ejemplo, la altitud del Mar Muerto es de aproximadamente -430 metros.

Answer:

  x=4.3m

Step-by-step explanation:

It is made up by six graphics.

Two triangles=1/2*x*5.6*2=5.6x

Base rectangular: 11.3x

Back rectangular: 11.3*5.6=63.28

Front rectangular:11.3*7.1=80.23

Add together: 5.6x+11.3x+63.28+80.23=216.18

                      16.9x=72.67

                            x=4.3m

Answer:

A. 5 cm

Step-by-step explanation:

AB = BC

x + 3 = 3x - 1

x - 3x = -1 - 3

-2x = -4

x = -4/-2

x = 2

BC = 3x - 1 = 3(2) - 1 = 6 - 1 = 5

Using the subtraction, the result of (29v)−(−13v+59) is 42v - 59

The distributive property is a fundamental property of arithmetic and algebra that involves the distribution of a factor across a sum or difference of two or more terms. The property states that when you multiply a number or term by a sum or difference in parentheses, you can distribute the multiplication to each term inside the parentheses and then simplify.

To subtract (29v)−(−13v+59), we first need to distribute the negative sign in front of the parentheses, which will change the signs of each term inside. So, we have

= 29v + 13v - 59

Then, we can combine the like terms, which in this case are the two terms with the variable v. We add the coefficients (numbers in front of v) to get

= 42v - 59

Learn more about distributive property here

brainly.com/question/6276874

#SPJ4

This person has walked a total of 22 miles. The total displacement vector for this walk is 10.06 miles at an angle of 12.58°. If this person walked straight home, they'd have to walk 10.06 miles.

To find the total displacement vector for this walk, we can use the Pythagorean Theorem to find the magnitude of the displacement vector and the direction of the displacement vector.

First, let's find the magnitude of the displacement vector:

d = √((Δx)² + (Δy)²)

Where Δx is the change in the x-direction and Δy is the change in the y-direction.

Δx = 5 + 4cos(45°) + 0 + 3cos(225°) + 4 = 9.83 miles
Δy = 0 + 4sin(45°) + 6 + 3sin(225°) + 0 = 2.17 miles

d = √((9.83)² + (2.17)²) = √(96.58 + 4.71) = √(101.29) = 10.06 miles

So, the magnitude of the displacement vector is 10.06 miles.

Next, let's find the direction of the displacement vector:

θ = tan⁻¹(Δy/Δx) = tan⁻¹(2.17/9.83) = 12.58°

So, the direction of the displacement vector is 12.58°.

Therefore, the total displacement vector for this walk is 10.06 miles at an angle of 12.58°.

If this person walked straight home, they'd have to walk 10.06 miles.

This person has walked a total of 22 miles. The total displacement vector for this walk is 10.06 miles at an angle of 12.58°. If this person walked straight home, they'd have to walk 10.06 miles.

For more about vector:

https://brainly.com/question/29740341

#SPJ11

Slope of PR = Slope of SU = rise / run = -3/2

The slope of a line is the ratio of the rise over the run, which is m = change in y / change in x.

To prove that the slope of line segment PR and the slope of line segment SU are equal, find the slope of each of the line given that are similar triangles:

Slope of PR = rise / run = PQ/QR = -3/2

Slope of SU = rise / run = ST/TU = -6/4 = - 3/2

Therefore, both line segments have the same slope of -3/2.

Learn more about the slope on:

https://brainly.com/question/3493733

#SPJ1

Answer:

x = -8, 8

Step-by-step explanation:

The student did make an error. When factoring [tex]x^2-64[/tex], they used incorrect factors. Using FOIL method, the students factored equation would become [tex]x^2 +32x-32x-1024 = x^2-1024[/tex], which is not [tex]x^2-64[/tex].

Instead, the factors 8 and -8 should be used.

[tex]x^{2} +5x-60=5x+4\\x^2 +5x - 64=5x\\x^2-64=0\\(x+8)(x-8)=0\\x=-8, 8[/tex]

Answer: x = ±8

Step-by-step explanation:

The given equation is:

x² + 5x - 60 = 5x + 4

The student's work shows that they simplified the equation correctly to:

x² - 64 = 0

However, their factorization of the resulting equation is incorrect. Factoring x² - 64 using difference of squares we get:

(x + 8)(x - 8) = 0

So, the solutions for x are x = -8 and x = 8. The student's solutions of x = ±32 are incorrect.

Therefore, the student made an error in factoring the equation, and the correct solutions for x are x = -8 and x = 8.

we can reject the null hypothesis

Null Hypothesis (H₀): μ ≥ 50

Alternative Hypothesis (H₁): μ < 50

Assumptions:
- A normal distribution for the population of LCBO stores
- A random sample of 20 stores
- A significance level of 0.05

Critical-value approach:

First, calculate the test statistic using the formula:

Test statistic = (Sample Mean - Population Mean) / (Standard Deviation / √Sample Size)

= (41.3 - 50) / (12.2 / √20)

= -2.6

Then, compare this test statistic to the critical-value.

The critical-value is the value that divides the acceptance and rejection regions of the distribution. The critical-value for a two-tailed test with a significance level of 0.05 is ±1.96.

Since -2.6 is less than -1.96, the test statistic falls into the rejection region and we reject the null hypothesis.

p-value approach:

Calculate the p-value using the formula:

p-value = 1 - CDF(test statistic)

Where CDF is the cumulative distribution function.

= 1 - CDF(-2.6)

= 0.004

Since 0.004 is less than 0.05, we reject the null hypothesis.

In conclusion, based on the critical-value approach and the p-value approach, we can reject the null hypothesis and conclude that the population mean sales increase is less than 50 cases.

Learn more about Null Hypothesis

brainly.com/question/28920252

#SPJ11

Answer: You have to simplify divide by x

Step-by-step explanation:

The product of 2/3 and 3/5 is 2/5    

To represent a fraction on a grid, we need to divide the grid into equal parts based on the denominator of the fraction, and then shade in a number of those parts based on the numerator of the fraction.

Here we have

=> 2/3 × 3/5

To solve 2/3 × 3/5, we multiply the numerators together and the denominators together

=> [ 2/3 × 3/5 ] = 6/15

=> [ 2/3 × 3/5 ] = 2/5        

This multiplication can be represented as given in the picture

Therefore,

The product of 2/3 and 3/5 is 2/5    

Learn more about Grids at

https://brainly.com/question/30501851

#SPJ1    

If the length of the rectangle is represented by x, then the height and width can be represented by the factors a and b, respectively. Therefore, the expression for the height and width in terms of the length can be written as:

Height = a * x

Width = b * x

These expressions can be used to find the height and width of the rectangle if the length and the factors are known.

For example, if the length is 10 and the factors are 2 and 3, then the height would be 2 * 10 = 20 and the width would be 3 * 10 = 30.

To know more about Rectangle:

https://brainly.com/question/22701905

#SPJ11

To find the image for each given value of k, we need to multiply the original volume (100 cubic units) by the scale factor (k).

Volume is a measure of the amount of space occupied by an object or substance. It is expressed as a numerical value, usually in cubic units, such as milliliters (mL) or cubic centimeters (cc). It is also used to measure the capacity of a container, such as a bottle, or a tank.

Dilation is a transformation that changes the size of a shape. When a solid is dilated by a scale factor of k, the new solid will be k times larger than the original solid. For example, if a solid has a volume of 100 cubic units and is dilated by a scale factor of 2, the image solid will have a volume of 200 cubic units (2 x 100).

To find the image for each given value of k, we need to multiply the original volume of the solid (100 cubic units) by the scale factor (k). We can use the equation V = kV0, where V0 is the original volume and V is the new volume, to calculate the new volume of the solid.

For example, if k = 3, the new volume will be 3 x 100 = 300 cubic units. If k = 4, the new volume will be 4 x 100 = 400 cubic units. In general, for any given value of k, the new volume will be k times the original volume.

To summarize, when a solid with a volume of 100 cubic units is dilated by a scale factor of k, the image solid will have a volume of k times the original volume (V = kV0). Therefore, to find the image for each given value of k, we need to multiply the original volume (100 cubic units) by the scale factor (k).

To know more about image

https://brainly.com/question/25029470

#SPJ1

Plot the coordinates on the graph to obtain the graph of the system of inequalities.

As Math World correctly notes, to solve a system of linear equations by graphing, we simply graph both equations in the same coordinate plane and locate the intersection of the two lines.

The visual technique actually just requires three easy actions to complete: Slope-Intercept Form should be applied to both equations.

Each linear equation's graph should be shown in the same coordinate plane. Identify the system's solution.

If the lines cross, the system's solution may be found by using the coordinates of the crossing point. The problem cannot be solved if the lines are parallel.

Let us suppose number of members =x.

Let us suppose the number of non members = y.

The system of equation for the following situation is:

5x + 10y ≤ 300

x ≥ 2y

Substitute different values of x to obtain different values of y.

Plot the coordinates on the graph to obtain the graph of the system of equations.

Learn more about system of inequalities here:

https://brainly.com/question/16339562

#SPJ1

The values of the variables are y =50 and x = 130

From the question, we have the following parameters that can be used in our computation:

The isosceles trapezoid

An isosceles trapezoid is a quadrilateral with two parallel sides of equal length and two non-parallel sides of unequal length.

This means that the base angles are congruent

Using the above as a guide, we have the following for the variable y

y = 50

Solving further, we have the following equation for variable x

x + 50 = 180

Evaluate the equation

x = 130

Hence, the value of x is 130

Read more about trapezoid at

https://brainly.com/question/1463152

#SPJ1

The average number of fruit flavored pieces you get in a bowl is 18.

To find the number of fruit flavored pieces you get in a bowl, you can calculate the average of the fruit flavored pieces in the five bowls you poured.

Here's how:

1: Add the number of fruit flavored pieces in each bowl: 3 + 23 + 20 + 23 + 21 = 90

2: Divide the total number of fruit flavored pieces by the number of bowls: 90 / 5 = 18

Therefore, the average number of fruit flavored pieces you get in a bowl is 18.

Learn more about average at

https://brainly.com/question/27193544

#SPJ11

Answer:

Step-by-step explanation: first if you do x/32.5 ≤ 117 = 3802.5 and also we know that 1 mile= 32.5, so if you take 32.5 * 117 it also equals 3802.5

so it will take him a minimum of 3802.5 gallons to drive 117 miles

Dakota would need at least 3.6 gallons of gasoline to drive 117 miles to his brother's house.

A statement that compares two numbers or expressions using an inequality symbol, such as (less than), > (greater than), (less than or equal to), or, is known as an inequality in mathematics (greater than or equal to).

Let x be the volume of gasoline required for Dakota to travel 117 miles to his brother's home. The minimum value of x can be calculated using the inequality shown below:

x ≥ 117 / 32.5

Here, we calculate the bare minimum amount of gasoline Dakota would require to travel 117 miles by dividing the whole distance (117 miles) by the miles per gallon (32.5 miles/gallon).

The inequality is reduced to: x ≥ 3.6

Dakota would therefore require 3.6 gallons of fuel to travel 117 miles to his brother's house.

To learn more about inequality, Visit

https://brainly.com/question/24372553

#SPJ1

The direction the plane flew is 14.6 degrees North of East.

So, the final answer is:

Distance = 342 miles

Direction = 14.6 degrees North of East

The distance the plane flew can be found using the Pythagorean Theorem, which states that for a right triangle, the square of the hypotenuse (c) is equal to the sum of the squares of the other two sides (a and b): c^2 = a^2 + b^2. In this case, the distance east (331 miles) is one side of the triangle and the distance north (86 miles) is the other side.

So, we can plug in the values and solve for c:

c^2 = 331^2 + 86^2

c^2 = 109561 + 7396

c^2 = 116957

c = √116957

c = 342 miles

Therefore, the distance the plane flew is 342 miles.

To find the direction, we can use trigonometry. The direction is the angle between the east-west line and the line connecting the starting point and the landing point. We can use the tangent function to find this angle:

tan θ = opposite/adjacent

tan θ = 86/331

θ = tan^-1(86/331)

θ = 14.6 degrees

Therefore, the direction the plane flew is 14.6 degrees North of East.

So, the final answer is:

Distance = 342 miles

Direction = 14.6 degrees North of East

Learn more about Distance

brainly.com/question/15172156

#SPJ11

Based on the properties of rectangles, the angles and the side lengths are KN = 11 and NLK = 32

From the question, we have the following parameters that can be used in our computation:

JN = 2x + 7, LN = 6x - 1

NKJ = 58 degrees

The diagonals or a rectangle are equal

So, we have

2x + 7 = 6x - 1

Evaluate the like terms

4x = 8

Divide

x = 2

So, we have

KN = 2 * 2 + 7

KN = 11

Adjacent angles in this case add up to 90 degrees

This gives

NLK = 90 - 58

Evaluate

NLK = 32

Hence, the measure of the angle is 32 degrees

Read more about rectangle at

https://brainly.com/question/25292087

#SPJ1

The graph of y = [1/2(x -10)] - 3, compared to the graph of 1/x, represents these following transformations:

A translation happens when either a figure or a function is moved horizontally or vertically on the coordinate plane.

The four translation rules for functions are defined as follows:

The translations for this problem are given as follows:

Additionally, there was a multiplication by 2 in the domain, meaning that the parent function was horizontally compressed by a factor of 2.

More can be learned about translations at brainly.com/question/28174785

#SPJ1

Answer:

Step-by-step explanation: your hot

The probability of A and B, using conditional probability, is given as follows:

0.24 = 24%.

The formula is:

[tex]P(B|A) = \frac{P(A \cap B)}{P(A)}[/tex]

In which the probabilities are listed and explained as follows:

To obtain the probability of A and B, the needed parameters are already given in the problem, and are as follows:

Hence the probability of A and B is calculated as follows:

P(A and B) = P(A) x P(B|A)

P(A and B) = 0.6 x 0.4

P(A and B) = 0.24.

More can be learned about conditional probability at https://brainly.com/question/10739997

#SPJ1

Other roots of the given trinomial equation apart from (x -1) will be:

A polynomial is a mathematical equation that solely uses the operations addition, subtraction, multiplication, and non-negative integer exponentiation of variables. Variables are sometimes known as indeterminate in mathematics. Majorly used polynomials are binomial and trinomial.

Given a trinomial equation x³ + x²-6x +4 that has a root (x + 1)

Let P(x) = x³ + x²-6x +4

It is given that ( x - 1 ) is one of the factor of p(x)

On dividing p(x) by (x - 1), we get:

P(x) = (x- 1) (x² +2x -1)

For the quotient of the factor we will use the quadratic formula

(x² +2x -1) = 0

From quadratic formula,

x = 1/2a(-b ± √(b² - 4ac))

x = 1/2(-2 ±√(4 +4)

x = -1 ± √2

Thus,

Other roots of the given trinomial equation apart from (x -1) will be:

x = -1 -√2

x = -1 + √2

Learn more about Polynomials here:

https://brainly.com/question/11536910

#SPJ1

Complete question:

if (x - 1) is a factor of x³ + x²-6x +4· find the other two factors​

The vector in the form \( \langle a, b\rangle \) is simply the given vector with the values of a and b identified and simplified as necessary.

To write the vector in the form \( \langle a, b\rangle \), we need to identify the values of a and b from the given vector. The value of a corresponds to the x-component of the vector, and the value of b corresponds to the y-component of the vector.

If the given vector is \( \langle 3, -4\rangle \), then the value of a is 3 and the value of b is -4.

If the given vector is \( \langle \frac{5}{2}, \sqrt{3}\rangle \), then the value of a is \(\frac{5}{2}\) and the value of b is \(\sqrt{3}\).

If the given vector is \( \langle -2\sqrt{2}, 7\sqrt{3}\rangle \), then the value of a is \(-2\sqrt{2}\) and the value of b is \(7\sqrt{3}\).

In all of these cases, the values of a and b are either integers or fractions, and any radicals are simplified as much as possible.

So, the vector in the form \( \langle a, b\rangle \) is simply the given vector with the values of a and b identified and simplified as necessary.

Learn more about Vector

brainly.com/question/29740341

#SPJ11

we have proven the statement sin^4(A) - cos^4(A) = 1 - 2cos^2(A) using the identity sin^2(A) + cos^2(A) = 1 and basic algebraic manipulation. Our work is legible, and our logic is clear and justified.

To prove the statement sin^4(A) - cos^4(A) = 1 - 2cos^2(A), we can use the following steps:

Step 1: Use the identity sin^2(A) + cos^2(A) = 1 to express sin^4(A) in terms of cos^4(A).

sin^4(A) = (1 - cos^2(A))^2

Step 2: Expand the expression on the right hand side.

sin^4(A) = 1 - 2cos^2(A) + cos^4(A)

Step 3: Rearrange the terms to get the expression on the left hand side.

sin^4(A) - cos^4(A) = 1 - 2cos^2(A)

Step 4: Verify that the expression on the left hand side is equal to the expression on the right hand side.

1 - 2cos^2(A) = 1 - 2cos^2(A)

Therefore, the statement sin^4(A) - cos^4(A) = 1 - 2cos^2(A) is proven to be true.

In conclusion, we have proven the statement sin^4(A) - cos^4(A) = 1 - 2cos^2(A) using the identity sin^2(A) + cos^2(A) = 1 and basic algebraic manipulation. Our work is legible, and our logic is clear and justified.

Learn more about identity

brainly.com/question/13652356

#SPJ11

So it will take 20 years for High School R and High School T to have the same enrollment.

Enrollment is the process of registering for classes at a college or university. The process usually involves submitting an application and providing transcripts and other documents to the school.

The enrollment at High School R is increasing by 15 students per year while High School T is decreasing by 10 students per year. To figure out how many years it will take for both schools to have the same enrollment, we need to calculate the difference between the two schools.
High School R currently has 200 students and High School T has 400 students. The difference between the two schools is 200 students (400-200 = 200).
Since High School R is increasing by 15 students per year and High School T is decreasing by 10 students per year, it will take 20 years for the two schools to have the same enrollment.
To calculate this, we divide the difference between the two schools (200 students) by the difference between the two schools' enrollment growth (15 students - 10 students = 5 students). This gives us 200/5 = 40. Since 40 years is too long, we divide 40 by 2 and get 20, which is the answer. So it will take 20 years for High School R and High School T to have the same enrollment.

To learn more about enrollment
https://brainly.com/question/1101942
#SPJ1

Answer:

8k - (5 + 2k) can be simplified by distributing the negative sign to the terms inside the parentheses:

8k - 5 - 2k

Then, we can combine like terms by adding the constants -5 and 8k:

6k - 5

Therefore, an equivalent expression to 8k - (5 + 2k) without parentheses is 6k - 5.

The null hypothesis (H0) is the hypothesis that is assumed to be true until there is evidence to suggest otherwise. In this case, the null hypothesis is that the percentage of car crashes that occur within 2 miles of the motorist's home is less than or equal to 47%. The alternative hypothesis (Ha) is the hypothesis that is being tested and is the opposite of the null hypothesis. In this case, the alternative hypothesis is that the percentage of car crashes that occur within 2 miles of the motorist's home is greater than 47%.

To express the null and alternative hypotheses in symbolic form, we can use the following symbols:

H0: p <= 47% (The percentage of car crashes that occur within 2 miles of the motorist's home is less than or equal to 47%)
Ha: p > 47% (The percentage of car crashes that occur within 2 miles of the motorist's home is greater than 47%)

Note that we are using the symbol <= for less than or equal to, and > for greater than. These symbols are used in hypothesis testing to express the null and alternative hypotheses in symbolic form.

Learn more about hypothesis

brainly.com/question/29519577

#SPJ11

Answer:

Tamara has $31.01 left

Step-by-step explanation:

Tamara has $70

Dress - $10

Drink - $4.99

Necklace - $20

Snack - $4

Add all of these costs up then subtract them by 70

10 + 4.99 + 20 + 4 = 38.99

70 - 38.99 = 31.01

[tex]70 - (10+4.99+4+20) = 70 - 38.99 = \$ \ 31.01[/tex]

The slope-intercept form of the equation of the line that has a slope of -1/6 and passes through the point (8,0) is y = -1/6x + 4/3.

To find the slope-intercept form of the equation of the line that has the given slope m and passes through the given point, we can use the point-slope form of a linear equation and then rearrange it to the slope-intercept form.

The point-slope form of a linear equation is given by:

y - y₁ = m(x - x₁)

Where m is the slope and (x₁, y₁) is the point that the line passes through.

In this case, m = -1/6 and the point is (8, 0).

Plugging these values into the point-slope form, we get:

y - 0 = -1/6(x - 8)

Simplifying and rearranging to the slope-intercept form, we get:

y = -1/6x + 8/6

y = -1/6x + 4/3

Learn more about slope-intercept form here: https://brainly.com/question/1884491.

#SPJ11

Answer:

To predict the number of people whose favorite snack is brownies, we need to use the proportion of people in the sample who said brownies were their favorite and apply it to the total number of people attending the reception.

The total number of people in the sample is:

27 + 19 + 74 + 60 = 180

The proportion of people in the sample who said brownies were their favorite is:

27/180 = 0.15

To predict the number of people at the reception whose favorite snack will be brownies, we can multiply the total number of people attending the reception by the proportion of people in the sample who said brownies were their favorite:

3200 x 0.15 = 480

Therefore, we can predict that approximately 480 people at the reception will have brownies as their favorite snack.