George bought a broken bicycle. He repaired it and sold it for $85. This was $20 more than twice what he paid for it. What was the original cost of the bicycle?

36 and 60 in exponential form

Solve the quadratic equation by completing the square 3x^2 - 6x-4=0

Determine the kinetic energy of a 1000-kg roller coaster car that is moving with a speed of 20.0m/s.

Which equation could be used to find the number of days, d, in h hours? A. 24+h=d B. 24h=d C. 24/h=d D. h/24=d

Write the inequality; Eight less than a number is greater than 0 and less than or equal to 1.

In the parking lot for 8 cars there are 7 trucks. What is the ratio of cars and trucks

A pyrotechnician plans for two fireworks to explode together at the same height in the air. They travel at speeds shown below, (firework A: 340 ft/s, firework B: 320 ft/s) Firework B is launched 0.25 s before Firework A.

The mean age of 5 people in a room is 40 years. A person enters the room. The mean age is now 35. What is the age of the person who entered the room?

What is 15 x minus 3 y = 0 written in slope-intercept form?

A sphere has a diameter of 14 ft. What is its surface area? The surface area of the sphere is ft squared. (Type an exact answer in terms of pi .)