Matthew collects purple and red marbles. he has 320 marbles and 65% of them are purple. How many red marbles does he have?

100 lbs divided by 2.2 equals what

Let A = {1, 2, 3, 4}, B = {3, 4, 5, 6}, and C = {5, 6, 7, 8}. Find each of the following sets. (Enter your answers in set-roster notation.) (a) A Δ B (b) B Δ C (c) A Δ C (d) (A Δ B) Δ C

Yuri walked p poodles and b bulldogs on Monday. He walked the same number of poodles and bulldogs each day Tuesday through Friday as he did on Monday. Write an algebraic expression to represent how many total dogs were walked in this 5-day period.

A ship is 2.8 degrees off course. If the ship is traveling at 14 mph, how far off course will it be after 2 hours?

How would you prove that the triangle below is equilateral? Idk How to add pics, the pic is just a equilateral triangle Show all angles to be congruent. Show two sides are of equal measure. Show at least two sides to be congruent.

What is the x-intercept of the line with the equation y = 1/2 x-3

The half life of ^134Ba is 28.7 hours. how much of a 16.2 sample of 134 Ba will be left after 60.00 hours

WXY is congruent to CBA, If

The school football team needs to raise at least $850 to buy new practice equipment. The team received a donation of $125 and also earns $4 per ticket sold.

Describe when to use a series and when to use an equation. For example, when would you use: f (x) = 3x+5 and when would you use: score = 2 + 3n (where n is 1, 2, 3 ...)