If I had 30 students in a class and the average age was 20.9 and I added twins and the average age changes to 21.6 years old, how old are the twins?

Macy wants to find the sum of 61,043 and 23,948. Her answer is 37,095. Find and correct her mistake

Noah currently has an account balance of $2,976.45. He opened the account 11 years ago with a deposit of $1,963.45. If the interest compounds quarterly, what is the interest rate on the account?

A rectangular prism has a length of 4 cm and a width of 5 cm. The volume of the prism is 200 cu cm. The height is unknown. Explain how to find height or the prism. Then give height.

What is the exact circumference of a circle has a radius of 50 cm

Sonny has $75 to spend the purchase he wants to make requires $93 if he borrows the extra money that he needs how much does he need to borrow

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.