Find the exact value of the expression without using a calculator.cos 
cos 
+ sin 
sin 
A. 
B. 
C. 
D. - 1
Answer: B
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Find the perimeter or circumference. Use ? ? 3.14 when needed.
A. 38 yd B. 57 yd C. 56 yd D. 180.5 yd
A statement Sn about the positive integers is given. Write statements S1, S2, and S3, and show that each of these statements is true.Sn: 12 + 42 + 72 + . . . + (3n - 2)2 = 
What will be an ideal response?
Solve the system by substitution.x + y = -1x - y = -11
A. ? B. {(-6, 5)} C. {(-7, 6)} D. {(6, 6)}
Translate into an equation, then solve.Betsy has a balance of -$508 on her credit card. What payment should she make to get the balance to 
A. -151 + x = -508; A payment of $457 must be made. B. -508 + x = -151; A payment of $457 must be made. C. -151 + x = -508; A payment of $357 must be made. D. -508 + x = -151; A payment of $357 must be made.