What is the length of the line segment between a(-5,8) and b(7,8)? 2 units 3 units 12 units 13 units

Answer these questions showing your work plz

Suppose that sahil knows that 45 people with ages of 18 to 29 voted. without using a calculator, he quickly says then 135 people with ages of 30to 49 voted. is he correct? how might sohil have come up with his answer so quickly?

Solve the equation.then check your solution 8=1.88+a