Anyone know how to solve these

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

Tom drove 206 miles in 3.9 hours. estimate his average speed.

Use your knowledge of the binary number system to write each binary number as a decimal number. a) 1001 base 2= base 10 b) 1101 base 2 = base 10