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There are no two numbers that multiply to 45 but add to -10.
This is because the only numbers that multiply to get 45 are 1x45, 3x15, 5x8. None of them can add to -10 even if you make some of the numbers negative instead.
If this is a factoring problem, you may have to use the quadratic equation instead.
If 36 of 80 marbles are blue, then the percent of marbles that are blue is 44% i think
X/1000=72/125 multiply both sides by 1000
x=72000/125
x=576
So the fraction is 576/1000
