Diagram is not drawn to scale. Could someone try and help me find x, I got 20 but it was wrong

Given a(-12,5) and b(12,29) find the point that divides the line segment ab three-eighths of the way from a to b

The deck that kenneth is building is in the shape of a parallelogram abcd the measure of angle c is one third the measure of angle b find the measure of each angle of the deck

Which of the following is the equation that says that the product of a number and ten is equal to 20 percent of that number ? a) 10n= 2.0n b) 10+n=.20n c) n+ .20n=10 d) 10n=0.20n