90% of 130 is 117 because 10% is 13 and 13x9 is 117 so that is part a. 130-117 is 13 so that is part b. And part c is correct because 100%-90%=10%. I hope this is helpful.
Answer:
y=4x-3
Step-by-step explanation:
Find the slope for your equation by calculating the change in y over change in x ∆y/∆x or (y2-y1)/(x2-x1)
13-5=8
4-2=2
8/2=4
We now need to use one of these coordinates to finish the equation y=4x+b
5=4(2)+b
5=8+b
b=-3
Now we rewrite our equation in slope int form as y=4x-3
You can check your work by using the other coordinate (4, 13) and see the equation balances.
