Choose the expression or equation that is equivalent to the one given.log7 7x
A. 1
B. 7
C. 7x
D. x
Answer: D
Mathematics
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Find the mean.99, 105, 89, 101, 86
A. 96 B. 99 C. 80 D. 105
Mathematics
Write an equation for the parabola.vertex: (-4, 1), directrix: x = -9
A. (x + 4)2 = -20(x - 1) B. (y - 1)2 = 20(x + 4) C. (x - 1)2 = 20(y + 4) D. (y - 1)2 = -20(x + 4)
Mathematics
Provide an appropriate response.Find f-1. Graph f and its inverse f-1 on one coordinate plane. Graph y = x as a dashed line for reference.f(x) = -2x - 2
A. f-1(x) = 
x + 1
B. f-1(x) = 2x + 2
C. f-1(x) = -2x + 2
D. f-1(x) = - 
x - 1
Mathematics
Solve the problem.A pair of running shoes costs $84 and a pair of basketball shoes costs 
Find the total cost for both pairs of shoes.
A. $40 B. $147 C. $21 D. $143
Mathematics