Find the product, if possible. 
A. 
B. 
C. 
D. 
Answer: B
Mathematics
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Find the exact value using a double-angle identity.cos(450°)
A. 
B. -1
C. - 
D. 0
Mathematics
Solve the equation.4 = b + 1
A. 3 B. -5 C. 5 D. -3
Mathematics
Perform the operation. Write the answer as a fraction in lowest terms.
+ 
A. 
B. 3
C. 
D. 1
Mathematics
Use the REGRESSION feature on a graphing calculator.Efficiency experts rate employees according to job performance and attitude. The results for several randomly selected employees are given below.
Find the regression line which can be used to predict performance rating if attitude rating is known.
A. y = 92.3 - 0.669x B. y = 2.81 + 1.35x C. y = -47.3 + 2.02x D. y = 11.7 + 1.02x
Mathematics