Which expression is equivalent to −1.3+(−4.9)+(−2.6) ? a −(1.3−4.9)+(−2.6) b −1.3+(4.9+2.6) c (1.3+4.9+2.6) d −1.3−(4.9+2.6)

Adepartment store purchases screen-printed t-shirts at a cost of $5 per shirt. they mark up the price 150% (making the selling price 250% of the store's purchase price) and put them on the sales floor. every month that a t-shirt doesn't sell, the store reduces the selling price by 25%.

School has 204 sixth grade students. if the sixth grade is 30% of the total school, how many students are in the middle school?

X+ y = 5 ; x - y =3 solve using linear combination