Rate of Change — Unit test Answers
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21
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If f(x) = |x| + 9 and g(x) = –6, which describes the range of (f + g)(x)?
A
(f + g)(x) 3 for all values of x
B
(f + g)(x) 3 for all values of x
C
(f + g)(x) 6 for all values of x
D
(f + g)(x) 6 for all values of x
22
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A salesperson earns $200 a week plus a 4% commission on her sales. Which equation models the relationship between her sales in a given week, s, and her weekly earnings, e?
A
Option
B
e = 200s + 4C
e = 4s + 200D
Option
23
The formula for the volume of a sphere is . What is the formula solved for r?
A
r = 3 uppercase V + 4 pi
B
r = RootIndex 3 StartRoot 3 uppercase V minus 4 pi EndRoot
C
r = RootIndex 3 StartRoot StartFraction 3 V Over 4 pi EndFraction EndRoot
D
r cubed = 3 uppercase V minus 4 pi
24
Given the equation what is the value of x?
A
x = y w + y minus 1
B
x = 2 y w + y minus 1
C
x = 2 y w + y minus 2
D
x = 4 y w + 2 y minus 2
25
If y varies directly as x, and y is 12 when x is 1.2, what is the constant of variation for this relation?
A
1B
10C
10.8D
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