Solve.x3 = -8x2 - 16x
A. 0, 4, 4
B. 4, 4
C. -4, -4
D. 0, -4, -4
Answer: D
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Solve the formula for the indicated variable. Then use the supplied values to solve the equation.The relationship between the distance p from an object to a lens, the distance q from the image to the lens, and the focal length f (the distance from the lens to the principal focus) is given by 
Solve for f. What is the focal length when p is 726 mm and q is 24.2 mm? (All values are approximate.)
A. f = p + q = 750 mm
B. f = 
+ 
= 1.00 mm
C. f = 
= 23.4 mm
D. f = pq - p - q = 16,800 mm
Convert using dimensional analysis.20 days to years
A. 1.255 yr. B. 0.055 yr. C. 1.667 yr. D. 0.556 yr.
Use synthetic division to find the quotient and the remainder.(x3 - 5) ÷ (x - 1)
A. Q(x) = x2 + x + 1; R(x) = 5 B. Q(x) = x3 - x2 - x - 1; R(x) = 0 C. Q(x) = x2 + x + 1; R(x) = -4 D. Q(x) = x2 - x - 1; R(x) = 0
Solve.A certain amount of money saved for 1 year at a certain annual interest rate (simple interest) yielded $16.20 in interest. If we had added $81 to the principal and reduced the interest rate by 1 percentage point(s), the interest would have been the same. Find the principal and the rate.
A. $1616.00, 5% B. $324.00, 5% C. $8.17, 19.83% D. $1616.00, 4%