Write the proportion.28 children is to 63 bicycles as 4 children is to 9 bicycles.
A. 
= 
B. 
= 
C. 
= 
D. 
= 
Answer: B
Mathematics
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Find the angle.cos-1 
A. 
B. 
C. 
D. 
Mathematics
Graph the following line.Through (-4, 5), m = 0
A. 
B. 
C. 
D. 
Mathematics
Compute the sales tax. Round to the nearest cent, if necessary.
A. $2.21 B. $2.26 C. $2.11 D. $2.41
Mathematics
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
Mathematics