A bag contains 80 marbles: 40 are red, 20 are blue, and 20 are black. what is the probability of selecting a red or blue marble at random

1/2 pound : 5 days find the unit rate

If Sarah is 24 years younger than her mother and if the sum of their ages is 68, how old is Sarah? x best represents. x - 24 best represents. what is sarah's age and what is her mothers age?

The half-life of a radioactive isotope is the time it takes for a quantity of the isotope to be reduced to half its initial mass. Starting with 150 grams of a radioactive isotope, how much will be left after 3 half-lives?

Jim divided - 2 by an integer and his result was between - 1 and 0. which integer could have been the divisor?

Two farmers had a truck. The first farmer paid 4/5 of thr price, in the second paid the rest of his Farmer's share was 9600 what was the total price of the truck

On tuesday, San and liz each bought 1/4 pound of donuts each day. Three other customers bought 1/2 pound of donuts each. How many pounds did the customers buy in all?

What is the value, after 7 years, of a Ford Mustang that originally costs $25000.00 if it depreciates at a rate of 8% per year? Round your answer to the nearest dollar.

A fox, a coyote, and a wolf weigh a total of 120 pounds. The ratio of the weight of the fox to the weight of the coyote is 3:8. The weight of the coyote is 32 pounds. What is the weight of the wolf?

What is the first 3 terms of the sequence of n^2+20

A black bean soup recipe calls for 2 cups of black beans for every 1.5 cups of water. If you plan on doubling the recipe what is the ratio of cups of black beans to cups of water? A) 2 to 1.5 B) 2 to 3 C) 4 to 1.4 D) 4 to 3.5