What is the meaning of "of"?

A bowl contains 10 red balls, 5 blue balls, and 8 green balls. A woman selects balls at random without looking in the bowl. How many balls must she select to be sure that she has at least one ball of each color

4x + 5y = 23 9x - 5y = 3

Calculamos la fuerza de atracción gravitatoria entre dos cuerpos de 12kg y 30kg separados 50cm

How do you write thirty five thousandths in decimal form

Solve 5|x| = 45 a. no solution b.-9 or 9 c. 9 d. 40

Determine how far the vehicle travels in 3 hours. A motorcycle travels 25 miles every 0.5 hour. The vehicle travels miles.

It takes a baseball player 16 seconds to round the bases and make it back to home plate home plate if it is 360 feet to go all around the bases then calculate the players average speed

Bruce and Mila are collecting baseball cards from their favorite teams, the Orioles and the Pirates. The equation r+p=28 represents the number of cards Bruce has. The equation 2r+p=43 represents the number of cards Mila has.

Kyra has a manufacturer's coupon for $5 off a box of diapers and a store coupon for 20% off any purchase. The store will let you use both coupons, but it does not have a policy about which coupon you must use first.

What does r equal? 5 (3-5r) + 3r = - (5r + 2)