Square root of (20 - r) = r

Pablo has $4200 to invest for college. If Pablo invest $4200 for three years and earn $630, what is the simple interest rate?

How to you solve (6x-4) - (6x+1)

Greatest common factor of 25 · 5· 11 and 23· 52 · 7

How would you add parentheses and brackets to make this sentence true: 45:2*4.7-4.4*6=54

at midnight, the temperature was - 8 F. at noon, the temperature was 23 F. Write an expression to represent the increase in temperature.

Is this an expression or an equation? Three times a number plus five equals twenty

14.36 rounded to the nearest tenth

There is jar of jellybeans on principal coopers desk 40% of the jelly beans are red. there are 28 red jeallybeans how many jelly beans are there in all

Tan (x) = 2 Solve for x. Round the answer to the nearest tenth.

The expression 5/9 (F - 32) shows how to convert from degrees Fahrenheit to degrees Celsius, where F represents the temperature in degrees Fahrenheit. What is the temperature in degrees Celsius when the temperature is 113 degrees F?