Answer:
16.2
Step-by-step explanation:
r = k/x
72 = k/9
k = 72*9
When r = 40 ,
x = k/r
x = 72*9/40 = 16.2
The answer is A. :). Have a great day!
You did not provide an image of the question or the question.
The correct answer it’s 4
Answer is 17.5
4x+10=80
subtract 10 both sides
so 4x =70
4x /4=70/4
x=17.5