Which equation can be used to solve the problem? 10 is 50 percent of what number?

Solve with work both bert and ernie received an increase in their weekly salaries. bert's salary increased from $520 to $520. ernie's salary went from $580 to $645. find the percent of increase for each salary. what was the larger of the two percents ?

Given abcd ac=38 and ae=3x+4 find the value of x

He that is measured at 220° is a reflex angle. the opposite angle is obtuse. find the measure of obtuse .