Multiply and simplify.
? 
A. y + 4
B. 
C. 
D. 
Answer: B
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Combine and simplify, if possible.2
- 9
A. -7
B. -20
C. 16
D. -16
Find a general expression for the slope of a tangent line to the indicated curve.y = 4x - 4x3
A. 4 - 4x2 B. 4 - 12x2 C. 4x - 12x2 D. 4x - 12x3
Solve the problem.Infant mortality rate is given as the number of deaths per 1000. The mortality rate in country A is 6 less than 9 times the infant mortality rate of country B. The difference in the two mortality rates is 114. Find the mortality rate of each country.
A. country A: 133; country B: 19 B. country A: 165; country B: 19 C. country A: 129; country B: 15 D. country A: 126; country B: 12
Find the center (h, k) and the radius r of the circle.2x2 + 2y2 - 8x + 16y + 22 = 0
A. (h, k) = (2, -4); r = 9 B. (h, k) = (-2, 4); r = 9 C. (h, k) = (-2, 4); r = 3 D. (h, k) = (2, -4); r = 3