What is the equation of the circle with center (5, - 4) and radius 4?

A) (x - 5) 2 + (y + 4) 2 = 4

B) (x + 5) 2 + (y - 4) 2 = 4

C) (x - 5) 2 + (y + 4) 2 = 16

D) (x + 5) 2 + (y - 4) 2 = 16

What's the answer for 9p+q-6p-q=

Suppose you did a survey of male shoes size and the mean of that survey was size 10 with a standard deviation of 1.5. What is the z-score of a size of 7.5?

What is the sum of the first five terms of a geometric series with a1 = 10 and r = 1/5? Express your answer as an improper fraction in lowest terms without using spaces.

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Write an equation of the line that passes through (7,10) and is perpendicular to the line y=1/2x-9.

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