Many times 4 can go into a 100?

Answer asap. you begin with 1/2 scoop of ice cream. since you're hungry, you ask the vendor for 2/7 more scoops of ice cream. then, you eat 5/8 scoops. how many scoops of ice cream are left on your cone? i will mark brainliest for first correct answer.

Simplify the expression below -3(10x+4y)+6(6x-2y)

(25 ! ) what does it mean for an equation to have no solution or infinitely many solutions?