Compute r, the linear coefficient of correlation, for the given data.
A. -0.078
B. -0.054
C. 0.109
D. 0.214
Answer: C
Mathematics
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Evaluate the expression.-10 + (-21)
A. -31 B. -11 C. 31 D. 11
Mathematics
Write an equation that expresses the fact that a function f is continuous at the number 4.
What will be an ideal response?
Mathematics
Find the solution set for the system by graphing both of the system's equations in the same rectangular coordinate system and finding points of intersection.x = y2 - 7x = y2 - 7y 
A. {(-6, -1)} B. {(-6, 1)} C. {(1, -6)} D. {(6, 1)}
Mathematics
Factor the trinomial completely. If the polynomial cannot be factored, write "prime."x2 + 9xy + 14y2
A. (x + 2y)(x + 7y) B. (x - 2y)(x + 7y) C. prime D. (x - 2y)(x + y)
Mathematics