For the given functions f and g, find the composition.f(x) = x3 + 7x; g(x) = -3x
Find (g ? f)(x).
A. -3x3 - 21x
B. -27x2 - 21x
C. -3x3 + 7x
D. -27x3 - 21x
Answer: A
Mathematics
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Simplify.
A. 4
B. 4
C. 4
D. 20
Mathematics
Given the measure of two of the angles, find the measure of the third angle.?ABC = 61.8° and ?CBD = 24.3° 
A. ?ABD = 93.9° B. ?ABD = 3.9° C. ?ABD = 37.5° D. ?ABD = 86.1°
Mathematics
Decide whether the statement is true or false.{3, 5, 7} ? {4, 6, 7} = {7}
A. True B. False
Mathematics
Multiply.× 
A. 0.0004515 B. 0.004515 C. 4.515 D. 0.04515
Mathematics