Solve the system.

A. (-8, -5)
B. (-8, 5)
C. (8, -5)
D. (8, 5)


Answer: D

Mathematics

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Find the circumference or area of the circle, as requested. Give an exact answer (in terms of ?) and an approximation using 3.14 for ?. If necessary, round to two decimal places.Find the area.

A. 2.25? m2; 7.07  m2 B. ? m2; 18.84  m2 C. 3? m2; 42.39  m2 D. 9? m2; 14.13  m2

Mathematics

Match the inequality with a graph.4x - 7y ? -4

A.

B.

C.

D.

Mathematics

Solve the problem.The mathematical model C(x) = 300x + 40,000 represents the cost in dollars a company has in manufacturing x items during a month. Based on this, how much does it cost to produce 200 items?

A. $100,000 B. $60,000 C. $1 D. $133

Mathematics

Find two possible missing terms so that the expression is a perfect square trinomial.x2 +  + 81

A. -9x, 9x
B. -18x, 18x
C. -162x, 162x
D. - x, x

Mathematics