05/26/17

simplify y=√(4x-x^2)

Hi I need help simplifying this equation 

The sum of -14-4 increased by3?

The sum of -14-4 increased by3?

3x-2y=-7. Y=x+4

Use substitution to solve the system of equations 

05/24/17

On a math test you obtained a score of 72 points. That was 80% of the total number of points on the test. How many total points were on the test

How do you find the answer and how on earth do you do it?  how do find the 80% worth of questions   

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