3c+2t=21 5c+6t=53 c=? t=?​

The length of a rectangle plus its width is 25 cm. the area is 156 square cm. what are the length and width of the rectangle? separate the answers with a comma.

You deposit $5000 each year into an account earning 3% interest compounded annually. how much will you have in the account in 30 years?

Find the least common multiple of the expressions: 1. 3x^2, 6x - 18 2. 5x, 5x(x +2) 3. x^2 - 9, x + 3 4. x^2 - 3x - 10, x + 2 explain if possible