Answer:
I don't know what's happening, but thanks for free points. :)))
Step-by-step explanation:
dont know wish i could help you :( sorry i hate when i can't answer a question it makes me feel bad
D. f(x)=4 (5/2)^x
Are really good tool for graphing problems is Demos.com
Let the number be x
3x + 5 = 20
3x = 20 - 5
x = 15/3
x=5
