Triangle ABC is a right triangle with sides of lengths a, b, and c and a right angle at C. Find the indicated trigonometric function value of A. Rationalize denominators containing radicals.a = 4, b = 
; find sin A.
A. 
B. 
C. 
D. 
Answer: C
Mathematics
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Use the FOIL method to find the indicated product below. ? (7p - 2q)(3p + 10q) ?
A. 70pq - 6pq B. 21p2- 6pq - 20q2 C. ?21p2- 20q2 D. ?10p2+ 18pq + 8q2 E. ?21p2+ 64pq - 20q2
Mathematics
Factor completely.x2 + 18x + 81
A. Prime B. (x + 9)2 C. (x - 9)2 D. (x + 9)(x - 9)
Mathematics
Simplify the expression.-3 + 4(8 - 2m)
A. 29 + 8m B. 32 - 8m C. 29 - 2m D. 29 - 8m
Mathematics
Solve.In a certain location, the highest temperature recorded was 99°F. The lowest temperature recorded there was 130 degrees lower than the highest. What was the lowest temperature recorded there?
A. 0°F B. 31°F C. -31°F D. -138°F
Mathematics