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
A
ABC and DEF are similar
so
AB/AC = DE/DF
30/24 = 5/x
30x = 24 * 5
30x = 120
x = 4
Answer