Marie worked 2 weeks during her college she earned $280 the first week and 245 the second week. If 1/2 of her total earnings went to taxes and 1/4 went to college tuition how much money did she have left

So in all this is $525. Half of this number is $262.50 (this is how much went towards taxes). A quarter of this number is $131.25 (this is how much went towards tuition).

So she got to keep 25% of her earnings which are $131.25.