An executive invests $21,000, some at 8% and the rest at 7% annual interest. If he receives an annual return of $1,570, how much is invested at each rate?

Abox contains 1 plain pencil and 4 pens. a second box contains 5 color pencils and 5 crayons. one item from each box is chosen at random. what is the probability that a plain pencil from the first box and a color pencil from the second box are selected? write your answer as a fraction in simplest form.

Taking algebra two apex courses and need with these questions

The length and width of a rectangle are consecutive even integers the area of the rectangle is 120 squares units what are the length and width of the rectangle