Dennis wants to buy a card for his wife. Dennis calculates the amount of the card as $4.50. The actual price of a card is $4. What is Dennis's percent error?

What expression represents the sum of (2x-5y) and (x+y)

Explain how you know if a number can be divided by 10 evenly

10 different names are put into a computer and one of the names is Colin. On a Saturday the computer chooses 2 names at random. The computer is set so that the same name can be chosen twice. What is the probability that Colin is chosen at least once

Write the expression for 90 less than the sum of 4 and h

What is the equation of a line that passes through (7, 8) and has a slope of - 3?

Solve the inequality 4 (x+1) < 2x+3 Show steps

How many solutions does the equation 5x + 10 = 5x - 8 have?

Stan is on a bike ride. His GPS indicates that he has traveled exactly 18 miles and he is 32% complete with his total ride. How many miles long is Stan's ride?

What is the inverse of f (x) = The quantity of three x plus five, over seven.?

The diameter of a sphere is 2 ft. What is the sphere's volume? Round to the nearest tenth.