Martha estimated there were 98 marbles in a jar for a contest. The actual number of marbles in the jar was 120. What was the percent error of Martha's estimation?

Find the Geometric mean x of 5 and 20

If the area to the left of x in a normal distribution is 0.187, what is the area to the right of x? (Enter an exact number as an integer, fraction, or decimal.)

Solve - 4y - 3 + 3y = 8 - 2y - 15 interpret the results

30 tens-3 tens 3tenths=

A 36 inch board is cut into three pieces so that the second piece is 3 times as long as the first piece and the third piece is 5 times as long as the first piece. If X represents the length of the first piece, find the lengths of all three pieces

Sun Valley and San Jose are 105 km from each other. How far apart would the cities be on a map that has a scale of 1 cm : 15 km?

Y^2-18y+81 quadratic equation/formula

if three pipes are all opened, they can fill an empty swimming pool in 3 hours. THe largest pipe alone takes one third the time that the smallest pipe takes and half the time the other pipe takes.

Greg drove at a constant speed in a rainstorm for 240 miles. He took a break, and the rain stopped He then drove 192 miles at a speed that was 8 miles per hour faster than his previous speed.

Shaun collected $925 on the first day of a charity fundraiser. On the second day, he collected $728. By the third day, he had collected a total of $2,538.