Find the equation of the tangent line to the curve when x has the given value.f(x) = 
; x = 4
A. y = 
+ 1
B. y = 
- 
C. y = -7x - 9
D. y = -7x + 28
Answer: A
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Translate into an equation and solve.The quotient of a number and -0.022 is -0.21.
A. 0.00462 B. -0.462 C. 0.000462 D. -0.0000462
Write the standard equation for the circle.Center at (5, 0), radius 9
A. x2 + (y + 5)2 = 9 B. (x - 5)2 + y2 = 81 C. (x + 5)2 + y2 = 81 D. x2 + (y - 5)2 = 9
Find the slope of the line shown in the figure.
?
?
A. ?
B. ?
C. ?3
D. -3
E. 1
Solve the problem.The following data show the list price, x, in thousands of dollars, and the dealer invoice price, y, also in thousands of dollars, for a variety of sport utility vehicles. Find a linear equation that approximates the data, using the points (16.5, 16.1) and (20.0, 18.3). 
A. y = 0.629x + 6.38 B. y = 1.59x - 9.11 C. y = 0.629x + 5.73 D. y = 1.59x - 10.2