Cancel and multiply fractions. 12\15×9\16​

Use the elimination method to solve the systems of equations. choose the correct ordered pair. 7x+4y=39

Aclassmate thinks that solving a system by graphing gives an exact answer when the lines appear to cross at a grid point, but only an approximate answer when they don't. explain why this isn't true.

In the equation sqrt(n+5)-sqrt(11-10)=1. what is the value of n