An executive invests $23,000, some at 8% and the rest at 7% annual interest. if he receives an annual return of $1,800, how much is invested at each rate

Find the unit rate for: 75% high-fiber chimp food to 25% high -protein chimp food.

The measurement of one angle of a right triangle is 42° what is the measurement of the third angle? (there is no picture)

If you were constructing a triangular frame, and you had wood in the length of 4inches, 4 inches, and 7 inches, would it make a triangle? would you be able to create a frame from these pieces of wood? yes or no. explain your mathematical thinking