11=5+a
a+4=b+3
Use both equations to work out the value for b

Answers

Answer 1

b=7

------------------


Related Questions

When an airplane accelerates down a runway at 3.20 m/s2 to 5.41 m/s2 for 28 s until is finally lifts off the ground calculate its acceleration before it takes off.

Answers

Answer:

-87.786

Step-by-step explanation:

Given:

Acceleration 1 = 3.20 m/s²

Acceleration 2 = 5.41 m/s²

Time = 28 s

To find: Acceleration before takeoff

Initial velocity = Average acceleration x time + 0.5 x acceleration 1 x time²

Initial velocity = 3.20 m/s² x 28 s + 0.5 x 3.20 m/s² x (28 s)²

Initial velocity = 2460.8 m

Acceleration before takeoff = (0 m/s - 2460.8 m/s) / 28 s

Acceleration before takeoff = -87.886 m/s²

Therefore, the acceleration before takeoff is -87.886 m/s².

One leg of a right triangle measures 7 feet. If the other leg is 1 foot shorter than the hypotenuse, find the dimensions of the triangle.

Answers

One leg of a right triangle measures 7 feet. If the other leg is 1 foot shorter than the hypotenuse, the dimensions of the right triangle will be 7 feet, 24 feet, and 25 feet.

To find the dimensions of the right triangle, we can use the Pythagorean Theorem, which states that for any right triangle, the square of the hypotenuse is equal to the sum of the squares of the other two legs. The formula for the Pythagorean Theorem is a² + b2 = c2, where a and b are the lengths of the legs and c is the length of the hypotenuse.

We are given that one leg of the triangle measures 7 feet, and the other leg is 1 foot shorter than the hypotenuse. Let's call the length of the other leg x and the length of the hypotenuse x + 1. We can plug these values into the Pythagorean Theorem to find the dimensions of the triangle:

72 + x2 = (x + 1)2

49 + x2 = x2 + 2x + 1

48 = 2x

x = 24

So the other leg of the triangle measures 24 feet, and the hypotenuse measures 24 + 1 = 25 feet. The dimensions of the right triangle are 7 feet, 24 feet, and 25 feet.

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There are 25 white tiles in a box. What percent of the tiles will Ally use to tile her laundry room floor.

Answers

The percentage of white tiles used out of 25 tiles in Ally's laundry room floor is 32%.

What is meant by percentage?

A figure or ratio stated as a fraction of 100 is called a percentage. Frequently, it is indicated with the per cent sign, "%". If we need to calculate a percentage of a number, we should divide it by its entirety and then multiply it by 100. The percentage, therefore, refers to a component per hundred. Per 100 is what the word per cent means. As there is no unit of measurement for percentages, they are dimensionless numbers. This is because we divide numbers with the same units in percentage calculation.

From the figure,

We can see that the total number of tiles used for flooring= 16

Out of this, 8 tiles used are white tiles.

Now it is said that the total number of white tiles is 25.

We are asked to find what percentage of 25 tiles are used on the laundry room floor.

We will use a fraction to describe the proportion of white tiles in the box to those used for the floor and then multiply it by 100 to find the percentage.

Percentage = ( white tiles used / Total number of white tiles ) * 100

            = 8/25 * 100 = 32%

Therefore the percentage of white tiles used out of 25 tiles in Ally's laundry room floor is 32%.

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Find the missing lengths. Give your answers in both simplest radical form and as approximations correct to two decimal places.
Create drawings as needed.
Given: ΔABC with m∠A = m∠B = 45° and BC = 6
Find: AC and AB

Answers

The missing lengths are AC = 3√2 ≈ 4.23 and AB = 3√2 ≈ 4.23.

To find the missing lengths of ΔABC, we can use the properties of a 45-45-90 triangle. A 45-45-90 triangle is a special type of right triangle in which the two legs are congruent and the angles are 45°, 45°, and 90°. The ratio of the sides in a 45-45-90 triangle is 1:1:√2, where the hypotenuse is √2 times the length of each leg.

Since we are given that BC = 6 and ∠A and ∠B are both 45°, we can conclude that ΔABC is a 45-45-90 triangle. Therefore, the lengths of AC and AB are both equal to the length of BC, which is 6.

AC = 6
AB = 6

To find the lengths in simplest radical form, we can multiply the lengths of AC and AB by √2/√2 to get:

AC = 6 * √2/√2 = 6√2/2 = 3√2
AB = 6 * √2/√2 = 6√2/2 = 3√2

To find the approximations correct to two decimal places, we can use a calculator to find the decimal values of 3√2:

AC ≈ 3 * 1.41 = 4.23
AB ≈ 3 * 1.41 = 4.23

Therefore, the missing lengths are AC = 3√2 ≈ 4.23 and AB = 3√2 ≈ 4.23.

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Minh has 2 cups of sesame seed one recipe calls for 1/3 cup of sesame seeds how many batches of the recipe Minh make

Answers

The number of batches of the recipe Minh makes is 6

What is proportion?

A proportion can be described as a mathematical comparison that is between two numbers.

These numbers can represent a comparison between things or people.

Also, proportions can also be written as two equivalent fractions. They are represented with the equality sign '=' or the equivalent sign ':'

From the information given, we have that;

For one recipe, one uses 1/3 cup of sesame seeds

Minh has 2 cups of sesame seeds

Then,

If 1/3 cup of sesame seeds = 1 recipe

Then 2 cups of sesame seeds = x

cross multiply

c = 2 × 3/1

c = 6 recipes

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What is the remainder when f(x)=x^3+7x^2+9x-5 is divided by (x+4)

Answers

On dividing (x³ + 7x² + 9x - 5) by (x + 4), we get -

h(x) = x² + 3x - 3 + 7/(x + 4).

What is Division algorithm?

Division algorithm states that -

Dividend = (Divisor x Quotient) + Remainder

Given is to find the remainder when -

(x³ + 7x² + 9x - 5) ÷ (x + 4)

We can write -

f(x) = (x³ + 7x² + 9x - 5)

g(x) = (x + 4)

So -

h(x) = f(x) ÷ g(x)

h(x) = (x³ + 7x² + 9x - 5) ÷ (x + 4)

h(x) = (x³ + 4x² + 3x² + 9x - 5)/(x + 4)

h(x) = x² + (3x² + 9x - 5)/(x + 4)

h(x) = x² + 3x + (-3x - 5)/(x + 4)

h(x) = x² + 3x - 3 + 7/(x + 4)

Therefore, on dividing (x³ + 7x² + 9x - 5) by (x + 4), we get -

h(x) = x² + 3x - 3 + 7/(x + 4).

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Find the volume of a right circular cone that has a height of 2.5 ft and a base with a diameter of 8 ft. Round your answer to the nearest tenth of a cubic foot

Answers

Answer:

41.9 cubic feet

Step-by-step explanation:

V = 1/3πr^2h,

r=radius

h=height.

V = 1/3πr^2h

  = 1/3π4^2 * 2.5

  = 40π/3 cubic feet

so the answer would be 41.9 cubic feet

Help me!
Apply the inscribed angle theorem.

What is the measure of angle C?
What is the measure of angle B?
What is the measure of angle BSD?
What is the measure of angle CSE?
What is the measure of angle E?
What is the measure of arc BC?

Answers

The solution is, the measure of the, inscribed angle: 30°, and,

central angle: 60°.

The solution are,

the measure of angle C is 52°

the measure of angle B is 52°

the measure of angle BSD is 71°

the measure of angle CSE is 71°

the measure of angle E is 57°

the measure of arc BC 57°.

What is an angle?

In Plane Geometry, a figure which is formed by two rays or lines that shares a common endpoint is called an angle. The two rays are called the sides of an angle, and the common endpoint is called the vertex.

here, we have,

from the given figure, we get,

The central angle is double the inscribed angle for the same intercepted arc.

Since doubling the angle adds 30° to it,

the original inscribed angle must be 30°.

so, we get,

Then the central angle is 30°+30° = 2·30° = 60°.

The solution are,

the measure of angle C is 52°

the measure of angle B is 52°

the measure of angle BSD is 71°

the measure of angle CSE is 71°

the measure of angle E is 57°

the measure of arc BC 57°.

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What is the volume of a sphere with a diameter of 8.6 m, rounded to the nearest
tenth of a cubic meter?

Answers

Answer:

The volume of a sphere with a diameter of 8.6 m = 333.0 m^3

Step-by-step explanation:

Find The Amplitude, Asymptotes, Complete Period, Period, And Phase Shift For Each Of The Following Trigonometric Functions If Exists. A. \( F(X)=4 \Sin [5(X-\Pi)] \) B. \( G(X)=-\Sec \Left[3\Left(X-\Frac{\Pi}{2}

Answers

A. Amplitude: 4,  Asymptotes: None,  Complete Period:  [tex]\(\frac{2\pi}{5}\)[/tex],  Period: [tex]\(2\pi/5\)[/tex],  Phase Shift:  [tex]\(\frac{\pi}{5}\)[/tex].
B. Amplitude: 1, Asymptotes:  [tex]\(x=\frac{\pi}{2}+\frac{2\pi}{3}n\)[/tex], Complete Period:  [tex]\frac{2\pi}{3}\)[/tex],     Period:  [tex]\(2\pi/3\)[/tex],  Phase Shift: [tex]\(\frac{\pi}{6}\)[/tex].

To find the amplitude, asymptotes, complete period, period, and phase shift for each of the given trigonometric functions, we need to use the standard form of the trigonometric functions:[tex]\[f(x)=A\sin(Bx+C)+D\][/tex] and [tex]\[g(x)=A\sec(Bx+C)+D\][/tex]

For function f(x), we have:
A = 4, B = 5, C = -π, and D = 0

The amplitude is |A| = |4| = 4

The period is  [tex]\(\frac{2\pi}{|B|}[/tex] = [tex]\frac{2\pi}{5}\)[/tex]

The phase shift is [tex]\(-\frac{C}{B}[/tex] = [tex]-\frac{-\pi}{5}[/tex] = [tex]\frac{\pi}{5}\)[/tex]

There are no asymptotes for the sine function.

For function g(x), we have:
A = -1, B = 3, C = -π/2, and D = 0

The amplitude is |A| = |-1| = 1

The period is [tex]\(\frac{2\pi}{|B|}[/tex] = [tex]\frac{2\pi}{3}\)[/tex]

The phase shift is [tex]\(-\frac{C}{B}[/tex] = [tex]-\frac{-\pi/2}{3}[/tex] = [tex]\frac{\pi}{6}\)[/tex]

The asymptotes occur when the cosine function is equal to zero, so the asymptotes are at  [tex]\(x=\frac{\pi}{2}+\frac{2\pi}{3}n\)[/tex] , where n is an integer.

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Identify the factor pair of ac you could use to rewrite b to factor the trinomial by grouping. 2x^(2)+7x-4

Answers

To factor the trinomial 2x²+7x-4, you could rewrite it as 2x²+8x-2x-4, and then factor by grouping. The factor pairs of ac are (x+4), (2x-1).


To factor the trinomial 2x²+7x-4 by grouping, we need to find a factor pair of ac that sums to b. In this case, ac = (2)(-4) = -8 and b = 7.

The factor pair of -8 that sums to 7 is 8 and -1. Therefore, we can rewrite the trinomial as follows:

2x²+7x-4 = 2x²+8x-x-4

Next, we can group the first two terms and the last two terms:

(2x²+8x)+(-x-4)

Now, we can factor out the greatest common factor from each group:

2x(x+4)-1(x+4)

Finally, we can factor out the common factor of (x+4):

(x+4)(2x-1)

Therefore, the factored form of the trinomial 2x²+7x-4 is (x+4)(2x-1).

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Find the volume of a cone whose depth is 14 cm and base radius is 9/2cm

Answers

The volume of the cone is approximately 94.25π cubic cm.

To find the volume of a cone, we use the formula V = 1/3πr²h, where V is the volume, r is the radius of the base, and h is the height or depth of the cone. In this case, we know that the depth of the cone is 14 cm and the base radius is 9/2 cm.

First, we need to calculate the radius of the base in terms of cm, since the formula requires it. We are given that the base radius is 9/2 cm, so we can substitute this value for r:

r = 9/2 cm

Next, we need to calculate the volume of the cone using the formula. We know that the depth of the cone is 14 cm, so we can substitute this value for h:

V = 1/3πr²h

V = 1/3π(9/2)²(14)

V = 1/3π(81/4)(14)

V = 1/3π(1134/4)

V = 1/3π(283.5)

V = 94.25π

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Can someone help me I need it quick

Answers

Evan because his question is easier to simplify because there are less fractions

Help me solve this problem please

Answers

The state income tax owed on a $40,000 per year salary is $1,500.

What is income tax?

A tax levied against people or organizations (taxpayers) in relation to their income or profits is known as an income tax. (commonly called taxable income). Tax rates multiplied by taxable income are typically used to calculate income taxes. Tax rates might change depending on the taxpayer's attributes and source of income.

To calculate the state income tax owed on a $40,000 per year salary, we need to determine which progressive tax range it falls into and apply the corresponding tax rate.

Since $40,000 falls within the range of $10,001 - $50,000, we will use the tax rate of 5% for this portion of the income.

First, we need to calculate the amount of income within this range -

$40,000 - $10,000 = $30,000

Next, we calculate the amount of tax owed on this portion of the income -

$30,000 x 0.05 = $1,500

Therefore, the value is obtained as $1,500.

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(Write down the formula to calculate the distance between (x₁, y₁) and (x2. y2).) Ans: d =​

Answers

The requried distance formula to calculate the distance between points (x₁, y₁) and (x₂, y₂) is d = √((x₂ - x₁)² + (y₂ - y₁)²)

What is Distance?

Distance is defined as the length of measure between two points on the coordinate plane.

Here,
The formula to calculate the distance between two points in a two-dimensional Cartesian coordinate system is:

d = √((x₂ - x₁)² + (y₂ - y₁)²)

Where (x₁, y₁) and (x₂, y₂) are the coordinates of the two points, and sqrt represents the square root function.

This formula is derived from the Pythagorean theorem, which states that in a right triangle, the square of the length of the hypotenuse (the side opposite the right angle) is equal to the sum of the squares of the lengths of the other two sides.

In this case, the two points represent the endpoints of the hypotenuse, and the distance between them is the length of the hypotenuse. Therefore, we can use the Pythagorean theorem to calculate the distance between the two points.

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what is 7.5= to in mm?

Answers

Answer:

7.5 inches is equal to 190.5 millimeters (mm).

To convert from inches to millimeters, we can use the conversion factor of 1 inch = 25.4 millimeters.

So, 7.5 inches x 25.4 millimeters/inch = 190.5 millimeters.

Help is greatly appreciated :). Will mark brainliest !:D

Answers

Answer:

The volume of a rectangular solid is given by the formula V = LWH, where L is the length, W is the width, and H is the height.

In this case, we have:

W = x + 3

L = x + 2

H = x

So the volume is:

V = (x + 2)(x + 3)(x)

V = x(x + 2)(x + 3)

V = x(x^2 + 5x + 6)

V = x^3 + 5x^2 + 6x

Therefore, the volume of the rectangular solid is given by the polynomial expression x^3 + 5x^2 + 6x.

Review Question Simplify the expression. (8d^((3)/(2))*7h^((5)/(6)))(7h^((3)/(2))*8d^((5)/(6)))

Answers

To simplify the expression (8d^((3)/(2))*7h^((5)/(6)))(7h^((3)/(2))*8d^((5)/(6))), we need to use the distributive property and the laws of exponents.

First, we can distribute the 8d^((3)/(2)) and 7h^((5)/(6)) to the 7h^((3)/(2)) and 8d^((5)/(6)):
= (8d^((3)/(2))*7h^((3)/(2)))*(7h^((5)/(6))*8d^((5)/(6)))
Next, we can use the laws of exponents to simplify the expressions with the same base:
= (8^2*d^((3)/(2)+(5)/(6))*7^2*h^((5)/(6)+(3)/(2)))
= (64*d^((11)/(6))*49*h^((9)/(6)))
Finally, we can simplify the exponents and multiply the constants:
= (3136*d^((11)/(6))*h^((3)/(2)))

Therefore, the simplified expression is 3136*d^((11)/(6))*h^((3)/(2)).

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What lump sum must be invested at 7​%, compounded​ monthly, for
the investment to grow to ​$61,000 in 13​years?

Answers

The lump sum that must be invested at 7% compounded monthly for the investment to grow to $61,000 in 13 years is $25,447.09.

To find the lump sum that must be invested at 7% compounded monthly for the investment to grow to $61,000 in 13 years, we can use the formula for compound interest;

A = P(1 + r/n)^(nt)

Where:
- A is the final amount
- P is the initial principal amount
- r is the annual interest rate
- n is the number of times interest is compounded per year
- t is the number of years

Plugging in the given values, we get:

61,000 = P(1 + 0.07/12)^(12*13)

Solving for P, we get:

P = 61,000 / (1 + 0.07/12)^(12*13)

P = 61,000 / (1.00583)^156

P = 61,000 / 2.39717

P = 25,447.09

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PLEASEEEEE ANSWERRR ANS HURRYYY

Answers

Given the box and whiskers plot with the given data, the five number summary would be :

Min - 2 Q1 = 4 Median = 8Q3 = 12Max = 15

How to find the five number summary ?

Arrange the numbers in order from smallest to largest:

2, 2, 3, 4, 5, 5, 8, 8, 10, 10, 11, 13, 15, 15, 15

The minimum number is therefore 2.

First Quartile Q1 = 4 :

= ( 15 + 1 ) / 4

= 4 th position

Median :

= ( 15 + 1 ) / 2

= 8 th position which is 8

Third quartile :

= ( 15 + 1 ) x 3 / 4

= 12 th position which is 13.

Maximum value is 15.

Move the box plot to correspond with these figures.

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Bill's SUV is 6 feet 4 inches tall. If he puts a 2 -foot 9 -inch box on top of his SUV, what is the total height of the SUV and the box (in feet and inches)?

Answers

Answer: The total height of the SUV and the box is 9 feet 1 inch.

Step-by-step explanation:

To solve this problem, we first convert the height of the SUV and the box from feet and inches to inches. The height of the SUV is 6 feet 4 inches, which is equal to 76 inches. The height of the box is 2 feet 9 inches, which is equal to 33 inches. We then add the heights of the SUV and the box to get the total height:

76 inches + 33 inches = 109 inches

To convert this back to feet and inches, we divide by 12 to get 9, with a remainder of 1. Therefore, the total height of the SUV and the box is 9 feet 1 inch.

Bills suv becomes 9ft 1in

You have a Poisson process with rate parameter λ = 2.
i. Let Xk be the waiting time for k occurences. Write down the probability
distributions for X1, X2, X3, and X5, and calculate the expected waiting
time E[Xk], the standard deviation σXk, and draw these four probability
distributions for the interval 0 ≤x ≤7. You do not need to include values
on the vertical axis.
ii. Let Yt ∼ ft(x) be the number of occurences in the span of t time units.
Draw the three probability distributions ft(x) (for t = 13, t = 12, t = 1.2)
for x = 0,1,2,3,4,5. Include values on the vertical axis.

Answers

The values on the vertical axis are the probabilities for each value of x. The probability of 0 occurrences in the span of 13 time units is f13(0) = 26^0 * e^(-26) / 0! = e^(-26) ≈ 0.0000000000000000000000000003.

The Poisson process is a type of stochastic process that counts the number of occurrences of an event in a given time interval. The rate parameter λ represents the average number of occurrences per unit time.

i. The waiting time for k occurrences in a Poisson process follows an exponential distribution with parameter λk. The probability distributions for X1, X2, X3, and X5 are given by:

X1 ∼ Exp(λ) = Exp(2)

X2 ∼ Exp(λ*2) = Exp(4)

X3 ∼ Exp(λ*3) = Exp(6)

X5 ∼ Exp(λ*5) = Exp(10)

The expected waiting time E[Xk] is given by 1/λk, and the standard deviation σXk is also given by 1/λk. Therefore, we have:

E[X1] = 1/λ = 1/2

E[X2] = 1/(λ*2) = 1/4

E[X3] = 1/(λ*3) = 1/6

E[X5] = 1/(λ*5) = 1/10

σX1 = 1/λ = 1/2

σX2 = 1/(λ*2) = 1/4

σX3 = 1/(λ*3) = 1/6

σX5 = 1/(λ*5) = 1/10

The probability distributions for the interval 0 ≤ x ≤ 7 are shown below:

ii. The number of occurrences in the span of t time units follows a Poisson distribution with parameter λt. The probability distributions ft(x) for t = 13, t = 12, and t = 1.2 are given by:

ft(x) = (λt)^x * e^(-λt) / x!

f13(x) = (2*13)^x * e^(-2*13) / x! = 26^x * e^(-26) / x!

f12(x) = (2*12)^x * e^(-2*12) / x! = 24^x * e^(-24) / x!

f1.2(x) = (2*1.2)^x * e^(-2*1.2) / x! = 2.4^x * e^(-2.4) / x!

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The sum of two consecutive integers is 85. Find the integers.
(Enter your answers as a comma-separated list.)

Answers

The sum of two consecutive integers 42 and 43  is 85.

The sum of two consecutive integers is 85. This means that we need to find two integers that are next to each other on the number line and add up to 85. We can write this as an equation:
x + (x + 1) = 85

Simplifying the equation gives us:
2x + 1 = 85

Subtracting 1 from both sides gives us:
2x = 84

Dividing both sides by 2 gives us:
x = 42

This means that the first integer is 42. Since the two integers are consecutive, the second integer is 42 + 1 = 43. Therefore, the two integers are 42 and 43.

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Which of the equations has no solution? 2(x-7)=2x-14 15x-30=0,2x+1=5x-3,3(2x+1)=6x+1

Answers

The equation that has no solution is 2x+1=5x-3.

To find out which equation has no solution, we can use the process of elimination. First, let's look at the equation 2(x-7)=2x-14. If we simplify this equation, we get:
2x-14=2x-14
This equation is true for all values of x, so it has infinitely many solutions.


Next, let's look at the equation 15x-30=0. If we simplify this equation, we get:
15x=30
x=2
This equation has one solution, x=2.

Now, let's look at the equation 2x+1=5x-3. If we simplify this equation, we get:
-3x=-4
x=4/3
This equation has one solution, x=4/3.

Finally, let's look at the equation 3(2x+1)=6x+1. If we simplify this equation, we get:
6x+3=6x+1
3=1

This equation is never true, so it has no solution.

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i need help solving this problem

Answers

Answer: A

Step-by-step explanation:

(3x ^ 2 + 4x - 7) (2x + 9)

2x (3x ^ 2 + 4x - 7) + 9 (3x ^ 2 + 4x - 7)

6x ^ 3 + 8x ^ 2 - 14x + 27x ^ 2 + 36x - 63

6x ^ 3 + 35x ^ 2 + 22x - 63

O is the center of the regular nonagon below. Find its perimeter. Round to the nearest tenth if necessary.

Answers

The perimeter of the regular octagon with an apothem of 4 units will be 26.51 units.

What is the perimeter of the regular polygon?

All the sides of the regular polygon are congruent to each other. The perimeter of the regular polygon of n sides will be the product of the number of the side and the side length of the regular polygon.

P = (Side length) x n

The Apothem of a regular octagon is 5 units. Then the side length of the regular octagon is given as,

tan (360° / (2 × 8)) = (n/2) ÷ 4

tan 22.5° = n / 8

n = 3.3137

Then the perimeter is given as,

P = 8 x 3.3137

P = 26.51 units

The perimeter of the regular octagon with an apothem of 4 units will be 26.51 units.

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What is the variable if


the trinomial a^2+7a+6 and the binomial a+1 have the same value?

Answers

The variable that satisfies the condition that the trinomial a^2 + 7a + 6 and the binomial a + 1 have the same value is a = -5 or a = -1.

How is a variable determined?

Setting the trinomial and binomial equal to one another and then solving for the variable will help us identify the variable that satisfies the stated criteria. Which is:

a^2 + 7a + 6 = a + 1

By putting all the terms to one side and grouping like terms, we may make this equation simpler:

a^2 + 6a + 5 = 0

The quadratic expression on the left-hand side can now be factored:

(a + 5)(a + 1) = 0

To make each factor equal to zero, we can use the zero product property:

a + 5 = 0 or a + 1 = 0

In each equation, we can solve for a to obtain:

a = -5 or a = -1

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1. A factory uses 2 machines, A and B, to produce wafers. Suppose machine A produces 70% of the wafers, of which 5% are defective, while machine B produces 30% of the wafers, of which 6% are defective. Find the probability that a randomly selected wafer is (a) produced by machine A and not defective (b) defective given that it is produced by machine B (c) defective (d) not defective
2. At Sam's tune-up and brake repair shop, the manager found that a car will require a tune-up with a probability of 0.6, a brake job with a probability of 0.02.
a) what is the probability that a car requires either a tune-up or a brake job?
b) what is the probability that a car requires a tune-up but not a brake job?
c) what is the probability that a car requires neither types of repair?
d) are the events "car requires a tune-up" and "car requires a brake job" independent and mutually exclusive?

Answers

1. (a) The probability that a randomly selected wafer is produced by machine A and not defective is 0.665 or 66.5%.
(b) The probability that a wafer is defective given that it is produced by machine B is 0.06 or 6%.
(c) The probability that a wafer is defective is 0.053 or 5.3%.
(d) The probability that a wafer is 0.947 or 94.7%.

2. (a) The probability that a car requires either a tune-up or a brake job is 0.608 or 60.8%.
(b) The probability that a car requires a tune-up but not a brake job is 0.588 or 58.8%.
(c) The probability that a car requires neither types of repair is 0.392 or 39.2%.
(d) The events "car requires a tune-up" and "car requires a brake job" are independent because the probability of one event occurring does not affect the probability of the other event occurring. They are not mutually exclusive because a car can require both a tune-up and a brake job at the same time.

We can find the probability using this calculation:

The probability that a randomly selected wafer is produced by machine A and not defective is 0.7 x 0.95 = 0.665 or 66.5%.

The probability that a wafer is defective is (0.7 x 0.05) + (0.3 x 0.06) = 0.035 + 0.018 = 0.053 or 5.3%.

The probability that a wafer is not defective is 1 - 0.053 = 0.947 or 94.7%.

The probability that a car requires either a tune-up or a brake job is 0.6 + 0.02 - (0.6 x 0.02) = 0.608 or 60.8%.
(b) The probability that a car requires a tune-up but not a brake job is 0.6 x (1 - 0.02) = 0.588 or 58.8%.
(c) The probability that a car requires neither types of repair is 1 - 0.608 = 0.392 or 39.2%.

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The following are body mass index (BMI) scores measured in 9 patients who are free of diabetes and participating in a study of risk factors for obesity. Body mass index is measured as the ratio of weight in kilograms to height in meters squared.
25 27 31 33 26 28 38 41 24
What is the standard deviation of BMI?

Answers

Therefore, the standard deviation of BMI for the 9 patients in the study is 5.67.

To find the standard deviation of BMI for the 9 patients in the study, we need to follow these steps:
Find the mean of the BMI scores: (25 + 27 + 31 + 33 + 26 + 28 + 38 + 41 + 24) / 9 = 29.67
Subtract the mean from each BMI score to find the deviation: -4.67, -2.67, 1.33, 3.33, -3.67, -1.67, 8.33, 11.33, -5.67
Square each deviation: 21.81, 7.13, 1.77, 11.09, 13.45, 2.79, 69.43, 128.51, 32.15
Find the mean of the squared deviations: (21.81 + 7.13 + 1.77 + 11.09 + 13.45 + 2.79 + 69.43 + 128.51 + 32.15) / 9 = 32.12
Take the square root of the mean of the squared deviations to find the standard deviation: √32.12 = 5.67

Therefore, the standard deviation of BMI for the 9 patients in the study is 5.67.

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Suppose you have 22 units of Virtual Currency and John takes 21 of them. How many units of Virtual Currency would you need to purchase Bloxburg on the rablax platform?


a. 1 unit of Virtual Currency (insufficient for Bloxburg purchase)

b. 25 units of Virtual Currency (sufficient for Bloxburg purchase)

c. 1 extra large unit of Virtual Currency (sufficient for Bloxburg purchase)

d. 62 units of Virtual Currency (insufficient for Bloxburg purchase)

Answers

In response to the aforementioned query, we may say that The right equation response is b. 25 virtual currency units (sufficient for Bloxburg purchase).

What is equation?

A mathematical equation links two statements and utilises the equals sign (=) to indicate equality. In algebra, an equation is a mathematical assertion that proves the equality of two mathematical expressions. For instance, in the equation 3x + 5 = 14, the equal sign separates the numbers by a gap. A mathematical formula may be used to determine how the two sentences on either side of a letter relate to one another. The logo and the particular piece of software are usually identical. like, for instance, 2x - 4 = 2.

You presently have 22 units of virtual currency, and John takes 21, according to the facts provided. You now only have 1 unit of virtual currency.

Consequently, to acquire Blox , you would require an additional 24 units of virtual currency.

The right response is b. 25 virtual currency units (sufficient for Bloxburg purchase).

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