Solve the equation by expressing each side as a power of the same base and then equating exponents. 5-x = 
A. 
B. {4}
C. 
D. {-4}
Answer: B
Mathematics
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Find the constant of proportionality k, and write the linear function relating the two variables.Suppose that Q varies directly with x and inversely with y. When Q = 3, x = 21 and y = 63.
A. k = 9; Q = 
B. k = 
; Q = 
C. k = 7; Q = 
D. k = 9; Q = 
Mathematics
Write sigma notation.1 - 
+ 
- 
+ 
- . . .
A. 
B. 
C. 
D. 
Mathematics
Write an equation, in slope-intercept form if possible, of the line through the pair of points.(-7, 0) and (0, 3)
A. y = 
x + 3
B. y = 
x + 3
C. y = - 
x + 3
D. y = - 
x + 3
Mathematics
Solve.4(x - 5) - 3(x - 3) = -5
A. 16 B. 6 C. -34 D. -16
Mathematics