AnswersMathematics III ASquare Root Functions

Square Root Functions Answers

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1
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If , which inequality can be used to find the domain of f(x)?

Question illustration
A
StartRoot one-half x EndRoot greater-than-or-equal-to 0
Option A
B
One-half x greater-than-or-equal-to 0
Option B
C
One-half x minus 10 greater-than-or-equal-to 0
Option C
D
StartRoot one-half x minus 10 EndRoot + 3 greater-than-or-equal-to 0
Option D
2
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Which equation is the inverse of y = 100 – x2?

A
y = plus-or-minus StartRoot 100 minus x EndRoot
Option A
B
y = 10 plus-or-minus StartRoot x EndRoot
Option B
C
y = 100 plus-or-minus StartRoot x EndRoot
Option C
D
y = plus-or-minus StartRoot x minus 100 EndRoot
Option D
3

What is the domain of the square root function graphed below?

Question illustration
A
x greater-than 1
Option A
B
x greater-than-or-equal-to 10
Option B
C
x greater-than 3
Option C
D
x greater-than-or-equal-to 3
Option D
4

Which equation is the inverse of ?

Question illustration
A
y = one-fifth x squared + six-fifths x + eleven-tenths
Option A
B
y = 3 plus-or-minus StartRoot 5 x + seven-halves EndRoot
Option B
C
Negative 5 y minus 4 = negative (x + 3) squared minus one-half
Option C
D
y = negative 3 plus-or-minus StartRoot 5 x + seven-halves EndRoot
Option D
5

What is the domain of the square root function graphed below?

Question illustration
A
x less-than-or-equal-to negative 1
Option A
B
x greater-than-or-equal-to negative 1
Option B
C
x less-than-or-equal-to 0
Option C
D
x greater-than-or-equal-to 0
Option D
6

If , which inequality can be used to find the domain of f(x)?

Question illustration
A
StartRoot one-half x EndRoot greater-than-or-equal-to 0
Option A
B
One-half x greater-than-or-equal-to 0
Option B
C
One-half x minus 10 greater-than-or-equal-to 0
Option C
D
StartRoot one-half x minus 10 EndRoot + 3 greater-than-or-equal-to 0
Option D
7

Which equation is the inverse of y = 16x2 + 1?

A
y = plus-or-minus StartRoot StartFraction x Over 16 EndFraction minus 1 EndRoot
Option A
B
y = StartFraction plus-or-minus StartRoot x minus 1 EndRoot Over 16 EndFraction
Option B
C
y = StartFraction plus-or-minus StartRoot x EndRoot Over 4 EndFraction minus one-fourth
Option C
D
y = StartFraction plus-or-minus StartRoot x minus 1 EndRoot Over 4 EndFraction
Option D
8

Which equation is the inverse of y = 2x2 – 8?

A
y = plus-or-minus StartRoot StartFraction x + 8 Over 2 EndFraction EndRoot
Option A
B
y = StartFraction plus-or-minus StartRoot x + 8 EndRoot Over 2 EndFraction
Option B
C
y = plus-or-minus StartRoot StartFraction x Over 2 EndFraction + 8 EndRoot
Option C
D
y = StartFraction plus-or-minus StartRoot x EndRoot Over 2 EndFraction + 4
Option D
9

Which equation is the inverse of y = 100 – x2?

A
y = plus-or-minus StartRoot 100 minus x EndRoot
Option A
B
y = 10 plus-or-minus StartRoot x EndRoot
Option B
C
y = 100 plus-or-minus StartRoot x EndRoot
Option C
D
y = plus-or-minus StartRoot x minus 100 EndRoot
Option D
10

What is the domain of the function ?

Question illustration
A
x greater-than-or-equal-to negative 7
Option A
B
x greater-than-or-equal-to negative 6
Option B
C
x greater-than-or-equal-to 6
Option C
D
x greater-than-or-equal-to 7
Option D

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