Use the sum/difference identities to simplify the expression. Do not use a calculator.cos 
cos 
+ sin 
sin 
A. cos 
B. cos 
C. cos 
D. cos 
Answer: C
Mathematics
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Perform the indicated operations and simplify the result. Leave the answer in factored form.
+ 
A. 
B. 
C. 1
D. 
Mathematics
Estimate the answer to the problem.An appliance store sells 38 refrigerators a week. Without finding the exact amount, calculate the total amount of money the store makes in a week if each refrigerator costs $938.
A. $30,000 B. $40,000 C. $27,000 D. $36,000
Mathematics
Find the function value.Find f(8) when f(x) = -
.
A. -5 B. 3 C. 8 D. 5
Mathematics
Write the equation of a line in slope-intercept form with the given slope that passes through the given point.m = - 
; (4, 5)
A. y = - 
x + 
B. y = - 
x - 
C. y = - 
x - 
D. y = - 
x + 
Mathematics