The rectangular coordinates of a point are given. Find polar coordinates for the point.(-3, 3)
A. 
B. 
C. 
D. 
Answer: B
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Find numbers a and b, or k, so that f is continuous at every point.
A. k = 42 B. k = 30 C. k = -6 D. Impossible
Factor by grouping.15wx - 3wy - 5xz + yz
A. (5x - z)(3w - y) B. (5x - y)(3w - z) C. (5wx - y)(3 - z) D. (5x + y)(3w + z)
Simplify the expression by combining like terms.4 + 13t + 7
A. 13t2 + 11 B. 13t + 28 C. 13t - 11 D. 13t + 11
Solve the problem.The paired data below consist of the test scores of 6 randomly selected students and the number of hours they studied for the test. By using linear regression, the following function is obtained: 
where x is number of hours studied and y is score on the test. Use this function to predict the score on the test of a student who studies 5 hours. 
A. 77.7 B. 67.7 C. 72.7 D. 74.8