Find the coordinates of the vertex for the parabola defined by the given quadratic function.f(x) = -7(x - 2)2 - 8

A. (-2, -8)
B. (2, -8)
C. (-8, 2)
D. (-7, -2)


Answer: B

Mathematics

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Replace the Cartesian equation with an equivalent polar equation.x2 + y2 = 49

A. r = 7 sin ? B. r = 7 or r = -7 C. r = 49 D. r = 7 cos ?

Mathematics

The two figures are congruent. Find the measure of the requested side or angle.?ABC

A. ?ABC = 23° B. ?ABC = 118° C. ?ABC = 39° D. ?ABC = 46°

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Write the function in terms of its cofunction. Assume that any angle in which an unknown appears is an acute angle.cos 31.2°

A. sin 58.8° B. cos 148.8° C. sec 148.8° D. sin 31.2°

Mathematics

Solve the system by elimination. + = 2 +  = -3

A. ?
B.
C.
D.

Mathematics