Solve for r.

33 + r = 82

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A rainstorm in Portland Oregon wiped out the electricity in 5% of the households in the city. Suppose that a random sample of 60 Portland households is taken after the rainstorm. a.

Find the eccentricity of the ellipse 4x^2 + 16y^2 + 32x-32y+16=0

Continuous compunding - initial investment=$12,500 APR=9% find the time to double and amount in 15 years

A hat contains cards with different colors. annabella randomly selects a card from the hat and returns the card to the hat after noting the color. after randomly selecting a card 30 times, she picked purple 7 times.

Katrina has 2 blue ribbons for her hair 1/4 of all her ribbons are blue how many ribbons does Katrina have in all

Miguel and three of his friends went to the movies. They originally had a total of $40. Each boy had the same amount of money and spent $7.50 on a ticket. Write and solve an equation to find how much money each boy had left after buying his ticket?

Factor completely 16x2 + 40x + 25

Which number is greatest? A) 6.23 * 10^12 B) 6.23 * 10^8 C) 6.23 * 10^-6 D) 6.23 * 10^3

A rectangle is 5 times as longer than it is wide. Its width is three-sixteenths of its perimeter. Find its perimeter.

Based on Pythagoras' theorem, how would you explain the structure of the Egyptian pyramids?