Please look at the picture below

Two times a number plus three times another number equals 4. three times the first number plus four times the other number is 7. find the numbers

If 30 lb of rice and 30 lb of potatoes cost ? $27.60? , and 20 lb of rice and 12 lb of potatoes cost ? $15.04? , how much will 10 lb of rice and 50 lb of potatoes? cost?

How many solutions does the nonlinear system of equations graphed below have? a. one b. zero c. four d. two