Solve using matrices.7x + 7y = - 77x - y = 5
A. 
B. 
C. 
D. 
Answer: B
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Evaluate the integral.
dx
A. 36 B. 81 C. 9 D. 54
Transform the polar equation to an equation in rectangular coordinates. Then identify and graph the equation.r = 4 cos ?
A. 
x2 + (y - 2)2 = 4; circle, radius 2,
center at (0, 2) in rectangular coordinates
B. 
(x + 2)2 + y2 = 4; circle, radius 2,
center at (-2, 0) in rectangular coordinates
C. 
x2 + (y + 2)2 = 4; circle, radius 2,
center at (0, -2) in rectangular coordinates
D. 
(x - 2)2 + y2 = 4; circle, radius 2,
center at (2, 0) in rectangular coordinates
Solve the problem.Evelyn measured two rooms of her apartment and found that she needed 31.7 square meters of wallpaper for one room and 59.1 square meters for the other. How much wallpaper did she need?
A. 90.9 m2 B. 181.6 m2 C. 100.8 m2 D. 90.8 m2
Translate to an algebraic expression.Seventy-nine less than two times a number
A. 2 - 79x B. 79 - 2x C. 2x - 79 D. 79x - 2