If AB equal 3 and BC equal 7 what does AC equal to

So me with this math problem. find the value of x the table shows the masses of 50 eggs. mass: 40-44 eggs: 6 mass: 45-49 eggs: x mass: 50-54 eggs: 12 mass: 55-59 eggs: 10 mass: 60-64 eggs: 7 mass: 65-69 eggs: 2 you!

Which of the following is true for the relation f(x)=2x^2+1

If you answer 2+2 you will get over 80 points