Use a double-angle identity to find the exact value of the expression.2 cos2 
- 1
A. 
B. - 
C. 
D. - 
Answer: B
Mathematics
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Determine if the given value is a solution to the inequality.
- 
? 
+ 1; x = -2
A. Yes B. No
Mathematics
Use a grapher to find the vertex, rounding to the nearest hundredth when necessary.f(x) = x2 + 2x - 5
A. (-1, -6) B. (1, -6) C. (1, 6) D. (-1, -5)
Mathematics
Translate the word statement into a percent proportion. Do not solve.What percent of 59 is 6?
A. 
= 
B. 
= 
C. 
= 
D. 
= 
Mathematics
Solve. If necessary, round to the nearest tenth.If a tree 42.5 feet tall casts a shadow that is 17 feet long, find the height of a tree casting a shadow that is 7 feet long.
A. 32.5 ft B. 2.8 ft C. 17.5 ft D. 103.2 ft
Mathematics