Square Root Functions

Question 1

Find the inverse of the function y = x2 – 12.

Revolt · Accepted Answer

B:

Question 2

Describe the three errors.

Revolt · Accepted Answer

The student did not switch both instances of x with y; the first line should be x = y² + 12y. He used only the principal square root instead of ±. He also gave the wrong domain: because the radicand is -11x, x must be less than or equal to 0.

Question 3

Check your answer. Did you identify these three errors correctly?

Revolt · Accepted Answer

AssessCtrl113c9d91-ee16-44e6-958a-efd0e0f5e3dd_1_A,AssessCtrl113c9d91-ee16-44e6-958a-efd0e0f5e3dd_1_B,AssessCtrl113c9d91-ee16-44e6-958a-efd0e0f5e3dd_1_C

Question 4

What is the domain of the function f(x) = ?

Revolt · Accepted Answer

D:

Question 5

Which inequality is used to find the domain?

Revolt · Accepted Answer

D:

Question 6

Choose the inverse of y = x2 – 10x.

Revolt · Accepted Answer

D:

Question 7

Use what you know about domain to select all of the following functions that could be the one graphed.

Revolt · Accepted Answer

AssessCtrl7e5a2a14-e859-4353-8bf0-20ddd24baff3_1_A,AssessCtrl7e5a2a14-e859-4353-8bf0-20ddd24baff3_1_B

Question 8

Suppose the Santa Monica has a hull length that is 10 ft shorter than that of the Nina Pinta. What expression represents the hull speed of the Santa Monica in terms of the length, ln of the Nina Pinta?

Revolt · Accepted Answer

Where a = and b = ln: 1.34; Where a = and b = ln: – 10

Question 9

Suppose the Santa Monica has a hull length that is 10 ft shorter than that of the Nina Pinta. What expression represents the hull speed of the Santa Monica in terms of the length, ln of the Nina Pinta?

Revolt · Accepted Answer

B: ✔ 1.34

Question 10

Find the inverse of the function y = 2x2 + 2.

Revolt · Accepted Answer

B:

Square Root Functions Answers

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