The matrix associated with the solution to a system of linear equations in x, y, and z is given. Write the solution to the system, if it exists.
A. x = -4, y = 4, z = 0
B. x = 0, y = 4, z = -4
C. x = 4, y = 4, z = -4
D. x = -4, y = 0, z = 4
Answer: B
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For the given correspondence, write the domain and the range. Then determine whether the correspondence is a function.{(-7, 2), (-4, -9), (-1, -5), (8, 2)}
A. domain: {-7, -4, -1, 8}, range: {-9, -5, 2}; Yes, it is a function. B. domain: {-7, -4, -1, 8}, range: {-9, -5, 2}; No, it is a not a function. C. domain: {-9, -5, 2}, range: {-7, -4, -1, 8}; Yes, it is a function. D. domain: {-9, -5, 2}, range: {-7, -4, -1, 8}; No, it is a not a function.
Find the length s. Round the answer to three decimal places.
A. 8.594 yd B. 9.425 yd C. 1.047 yd D. 18.85 yd
Simplify the expression. Assume that all variables represent nonnegative numbers.
+ 10
- 3
A. -150
B. -36
C. 39
D. 36
Solve the problem.An oil well off the Gulf Coast is leaking, with the leak spreading oil over the surface of the gulf as a circle. At any time t, in minutes, after the beginning of the leak, the radius of the oil slick on the surface is 
Find the area A of the oil slick as a function of time.
A. A(r(t)) = 36?t2 B. A(r(t)) = 36t2 C. A(r(t)) = 36?t D. A(r(t)) = 6?t2