Compute r, the linear coefficient of correlation, for the given data.The paired data below consist of the costs of advertising (in thousands of dollars) and the number of products sold (in thousands):
A. 0.708
B. 0.235
C. 0.246
D. -0.071
Answer: A
Mathematics
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Perform the indicated operation and simplify.
- 
A. 
B. 
C. 
D. 
Mathematics
Factor completely. If the polynomial is prime, state this.7x2 + 7xy + y2
A. (7x + y)(x + y) B. (7x + y)(x - y) C. Prime D. 7(x + y)2
Mathematics
Find zw or 
as specified. Leave your answer in polar form.z = 8
w = 3
Find 
.
A. 5
B. 
C. 5
D. 
Mathematics
For the function, find the average rate of change of f from 1 to x: 
f(x) = 
A. 
B. - 
C. 
D. 
Mathematics