a bag contains 60 marbles. Some are red and the rest are black. There are 9 red marbles for every black marble (1 black marble). How many red marbles are in the bag?

Pam asked a bank teller to cash a check for $130. The teller gave Pam a total of 9 bills. She received $10 bills and $20 bills. How many of each type of bill did Pamela receive? Write a system of equations to solve the problem.

18. There were 340,000 cattle placed on feed. Write an equivalent ratio that could be used to find how many of these cattle were between 700 and 799 pounds.

Jason says the quotient 517:5 is 103 r2. Use multiplication to show if jason's answer is correct.

How do i find 2/4of36?

The expression below can be used to find the surface area of a cube when given the length of an edge, a. 6a2 What is the surface area of a cube with an edge length that measures 0.5 centimeters?

If the rate of inflation is 3.9% per year, the future price p (t) (in dollars) of a certain item can be modeled by the following exponential function, where t is the number of years from today. p (t) = 400 (1.039^t).

The number of measles cases has increased by 8.3% since 2000. Express your answer rounded correctly to the nearest hundredth. Stated another way, the number of measles cases is times what it was in 2000.

f (x) = |x|+1 transform f by shifting it left 5 units and up 8 units, and write the new function equarion.

What is the percent change from 70 to 56

Which rational number is equivalent to 3.27 repeating? A. 327/990 B. 27/99 C. 47/11 D. 3 27/10 E. 3 27/100