A survey of 150 students showed that 90 were taking psychology, 75 were taking economics and 22 were taking neither. The number taking both was _____.

A. 165
B. 143
C. 128
D. 37

Answer: D

Mathematics

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Graph the parabola.y2 = 5x

A.

B.

C.

D.

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Find parametric equations to represent the line segment from (-3,4)to(12,-8).

What will be an ideal response?

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Write the solution set in interval notation.-3 < w ? 1

A. {w|-3 < w ? 1} B. {w|-3 < w < 1} C. {w|-3 < w ? 1} D. {w|-3 > w ? 1}

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Given matrices A and B, find the indicated matrix if possible.A =  , B =   Find AB.

A.

B. AB is not defined.
C.

D.

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