Since he’s already at -15, if he writes a check for 7 then he’s subtracting more from his account.
So, -15-7=-22






Note
Write the number until underlined point.I did it till end
Answer:
f(x)=2(\dfrac{2}{3})^x.
Step-by-step explanation:
f(x)=1/2(2)xf(x)=3/4(-1/5)xf(x)=(7/2)xf(x)=2(2/3)x