Solve the problem.Use the formula 
to find the grade resistance of a 
car traveling on a 
uphill grade. Calculate R to the nearest ten pounds.
A. 220 lb
B. 150 lb
C. 170 lb
D. 200 lb
Answer: C
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The rectangular coordinates of a point are given. Express the point in polar coordinates with 
and 
(0, 
)
A. (7, 90°)
B. (7, 270°)
C. (
, 90°)
D. (
, 270°)
Find the vertex of the parabola, and determine whether the parabola opens upward, downward, to the left, or to the right.y = (x + 1)2 - 8
A. (-1, -8), up B. (1, 8), up C. (-1, 8), down D. (1, -8), down
Use the quadratic function to determine if the function has a maximum or minimum value and then find this maximum or minimum value.f(x) = x2 + 20x + 91
A. maximum at (-9, 0) B. maximum at (-9, -10) C. minimum at (-10, -9) D. minimum at (0, -10)
Write a numerical expression for the phrase and simplify it.The sum of -7 and -8, increased by -5
A. [(-7) + (-8)] + (-5); -6 B. [(-7) + (-8)] + (-5); -20 C. [7 + 8] + 5; 20 D. [(-7) + (-8)] + 5; -10