Marco has a bag of 50 colored marbles. there are 12 blue marbles, 18 black marbles, and 20 red marbles. what is the ratio of the numbers of black marbles to the number of blue marbles

Harry and Gwen ride in a bicycle race. Harry clocks 102.62 meters per minute, and Gwen clocks 101.94 meters per minute. What is the difference in their cycling speeds?

What adds to 6 and multiplies to 18

Which is a multiple of 15? a. 1 b. 5 c. h d. 15

Fifty-two hundredths of what number is 104

The speed at which a certain computer can access the Internet is 2 megabytes per second. How fast is this in megabytes per hour?

What is the answer to this problem? 7-3x - 15=19

1/2a - 1/2 = - 3 solve the following equation

Henry wants to resize a 10 inch wide by 12 inch long photograph for the school newspaper. It is to fit in a space that is 5 inches wide. What is the length of the resized photograph in inches? a. 6 inches c. 4 inches b. 12 inches d. 7 inches

If X = 3 units, Y = 9 units, and Z = 5 units, what is the volume of the right rectangular pyramid shown above?

How many solutions does the equation 6y - 3y - 7 = - 2 + 3 have? A. Two B. None C. Only one D. Infinitely many Also explain how you got the answer so i can learn more about it.