How could you write 4/8 as a percent without dividing

A teacher has two students, one two times as old as the other. The teacher is five times as old as the older student, and in 5 years she will be five times as old as her younger student. Find the teacher's present age.

M+45=32 solve the equation

The hypotenuse of a 45 degree negative 45 degrees - 90 degree triangle measures 4 cm what is the length of one leg of the triangle

When a number is decreased by 30%of itself, the result is 126. what is the number?

Change 84% to a fraction

If you double the sum of 5 and the number you will get 16

Train B travels 140 miles which is 40% of the total distance it will travel. What is the total number of miles train B will travel?

On a string of red and blue lights, the red lights blink everyb3 seconds, and the blue lights blink every 5 seconds. How many times will they blink at the same time in one minute?

18, - 82, - 182, - 282,

To calculate 31^2, Emily mentally figures the value 30^2 and adds 61. Emily subtracts a number from 30^2 to calculate 29^2. What number does she subtract?