Help please if you can

Which is a reasonable estimate of the amount of water in a small, inflatable pool used by children?

Hillel is juggling flaming torches to raise money for charity. his initial appearance raises $500\$500 $500 , and he raises $15\$15 $15 for each minute of juggling performance. the amount rr r of money hillel raises is a function of tt t , the length of his performance in minutes. write the function's formula.

Solve 2x+y=3 x+y=5 in substitution method