If h(x)=3x + 4 , what is h(2x-3)

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.

7+(3n++8) what is the answer to this?

Can someone me and explain..will award brainlest!