Write a system of inequalities whose solution set is the region shown.
A. x ? 0, y ? 4, y ? 0, y ? -x + 6
B. x ? 0, x ? 4, y ? 0, y ? x + 6
C. x ? 0, x ? 4, y ? 0, y ? -x + 4
D. x ? 0, x ? 4, y ? 0, y ? -x + 6
Answer: D
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2
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Translate to an equation, then solve.The product of negative three and a number is twelve.
A. -4n = 3, n = 4 B. -3n = 12, n = 4 C. -3n = 12, n = -4 D. -3 + n = 12, n = 15
A function of x is depicted in the graph. Find any input values that produce the indicated output.f(x) = -4
A. 4 B. -4 C. 3 D. 2
Solve the problem.Car A (travelling north at 70 mph) and car B (traveling west at 60 mph) are heading toward the same intersection. Car A is 5 miles from the intersection when car B is 7 miles from the intersection. Find parametric equations that describe the motion of cars A and B. 
A. Car A: x = -70t + 5, y = 0; Car B: x = 7 - 60t, y = 0 B. Car A: x = 0, y = 60t - 7; Car B: x = 70t - 5, y = 0 C. Car A: x = 60t - 7, y = 0; Car B: x = 0, y = 5 - 70t D. Car A: x = 0, y = 70t - 5; Car B: x = 7 - 60t, y = 0