Square Root Functions Answers
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21
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What is the domain of the square root function graphed below?
A
x greater-than 1
B
x greater-than-or-equal-to 10
C
x greater-than 3
D
x greater-than-or-equal-to 3
22
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Which equation is the inverse of y = 2x2 – 8?
A
y = plus-or-minus StartRoot StartFraction x + 8 Over 2 EndFraction EndRoot
B
y = StartFraction plus-or-minus StartRoot x + 8 EndRoot Over 2 EndFraction
C
y = plus-or-minus StartRoot StartFraction x Over 2 EndFraction + 8 EndRoot
D
y = StartFraction plus-or-minus StartRoot x EndRoot Over 2 EndFraction + 4
23
Which equation can be simplified to find the inverse of y = 5x2 + 10?
A
x = 5y2 + 10B
StartFraction 1 Over y EndFraction = 5 x squared + 10
C
–y = 5x2 + 10D
y = one-fifth x squared + one-tenth
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