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2 years ago

If f(x)= 2x-7, what is the equation for f^-1(x)

Mathematics

1 answer:

Citrus2011 [14]2 years ago

4 0

F^-1(x)= (x+7)/2
it's the inverse so adding is subtracting and multiplication is divison

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The weights of adobe bricks used for construction are normally distributed with a mean of 3 pounds and a standard deviation of 0

dedylja [7]

Answer: a) 0.8413, b) 0.9987.

Step-by-step explanation:

Since we have given that

Mean = 3 pounds

Standard deviation = 0.25 pounds

n = 28 bricks

So, (a) What is the probability that all the bricks in the sample exceed 2.75 pounds?

$P(X>2.75)\\\\=P(z>\dfrac{2.75-3}{0.25}\\\\=P(z>\dfrac{-0.25}{0.25})\\\\=P(z>-1)\\\\=0.8413$

b) What is the probability that the heaviest brick in the sample exceeds 3.75 pounds?

$P(X>3.75)\\\\=P(z>\dfrac{3.75-3}{0.25})\\\\=P(z>\dfrac{0.75}{0.25})\\\\=P(z>3)\\\\=0.9987$

Hence, a) 0.8413, b) 0.9987.

4 0

3 years ago

25% of lower department store prices

Crank

Step-by-step explanation:

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6 0

2 years ago

The distance between City A and City B is 500 miles. A length of 1.8 feet represents this distance on a certain wall map. City C

Ratling [72]

Answer: 800 miles

Step-by-step explanation:

Let the actual distance between City C and City D be represented by x.

The information given in the question can be formed into an equation as:

1.8 feet / 2.88 feet = 500 miles / x

Cross multiply

1.8 × x = 500 × 2.88

1.8x = 1440

x = 1440/1.8

x = 800

Therefore, the actual distance between City C and City D is 800 miles.

3 0

3 years ago

56°<br> х<br> 20<br> Solve for x. Round to the nearest<br> tenth.

otez555 [7]

Answer:

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Step-by-step explanation:

4 0

2 years ago

Select the correct answer.

Digiron [165]

C because if you plug one into the other the answer comes out as x and that is how you know it is an inverse

7 0

2 years ago