Is (10, 5) a solution to this system of inequalities?

20x + 4y > 5
x + y < 15

Apackage of bacon holds 15 strips of bacon. the pancake house uses 17 packages of bacon in the morning and 21 packages in the afternoon. how many more strips were used in the afternoon than the morning?

If 7x=9y, y/z = 7/5 , then x/z = (a) 2/7 (b) 7/9 (c) 9/5 (d) 9/7 (e) 5/9

You eat $0.85 for every cup of hot chocolate you sell. how many cups do you need to sell to earn $55.25