If f(x) = 2x2 + 3 and g(x) = x2 – 7, find (f – g)(x).
a. 3x2 – 4
b. x2 – 4
c. x2 + 10
d. 3x2 – 10
! give me the answer

(f – g)(x) = 2x2 + 3 - (x2 – 7)
(f – g)(x) = 2x2 + 3 -  x2 + 7
(f – g)(x) = x2 + 10

answer is C. x2 + 10

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since the cosine is the ratio of the adjacent side to the hypotenuse, you can see that cos 60° = ½. answer. according to the property of cofunctions (topic 3), sin 30° is equal to cos 60°. sin 30° = ½.