Complete the identity.tan (? - ?) = ?
A. -cot ?
B. -tan ?
C. cot ?
D. tan ?
Answer: B
Mathematics
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Solve by substitution and check.x + y = 9 y = 2x + 3
A. (7, 2) B. (2, 7) C. (3, 6) D. (1, 9)
Mathematics
Does the problem involve permutations or combinations? Do not solve.From 8 names on a ballot, a committee of 3 will be elected to attend a political national convention. How many different committees are possible?
A. permutations B. combinations
Mathematics
Find the vertex of the parabola.f(x) = -x2 + 7x - 7
A. 
B. 
C. (7, -7)
D. 
Mathematics
Find the composite function for the given functions.f ? g for f(x) = 3x + 14 and g(x) = 5x - 1
A. 15x + 13 B. 15x + 11 C. 15x + 17 D. 15x + 69
Mathematics