Determine if the equation is an identity.cos (A + B) cos (A - B) = cos2 A + cos2 B - 1
A. No
B. Yes
Answer: B
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Translate the problem situation to a system of equations. Do not attempt to solve.Sarah Comar's Candy Store sold a total of 33 pounds of jelly beans, selling two kinds of jelly beans. The first kind was priced at $3.45 per pound, and the second was priced at $1.12 per pound. In all, $83.56 was taken in for the two types of jelly beans. How many pounds of each kind were sold? (Let x represent the number of pounds of the first kind and y represent the number of pounds of the second.)
A. x + y = 33, 3.45x + 1.12y = 83.56 B. x + y = 4.57, 3.45x + 1.12y = 83.56 C. x + y = 33, 4.57x + y = 83.56 D. x + y = 83.56, 3.45x + 1.12y = 33
Solve the equation.-10.1 - 2x = 1.5
A. -1.8 B. -7.3 C. -5.8 D. -1.6
Convert the units.161 g = 
kg
A. 16,100 kg B. 161,000 kg C. 0.0161 kg D. 0.161 kg
Use transformations to graph the function.f(x) = 2(x + 3) + 2
A. 
B. 
C. 
D. 