Simplify the expression by combining like terms if possible.-2b + 7b
A. 5b2
B. 5b
C. 5 + b
D. -5b
Answer: B
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Determine the symmetries of the curve.r2 = -5 cos 5?
A. Origin only B. No symmetry C. x-axis, y-axis, origin D. x-axis only
Solve.Sammy received a birthday check for $40.00 from his aunt. He immediately cashed the check and went on a shopping spree. In three different stores he spent $13.86, $12.53, and $6.60, respectively. How much was left of the birthday money after these purchases?
A. $32.99 B. $7.31 C. $8.01 D. $7.01
Solve the triangle.a = 6, b = 8, C = 70°
A. c = 6.3, A = 28.6°, B = 81.4° B. c = 9, A = 52.8°, B = 57.2° C. c = 10, A = 56.9°, B = 53.1° D. c = 8.2, A = 43.5°, B = 66.5°
Use a combination of rules for exponents to simplify. Write answers with only positive exponents. Assume that all variables represent nonzero real numbers.
2
A. 
B. 
C. 
D. 