Answer:
7.2%
Step-by-step explanation:
Given data
Estimate=450miles
Actual= 485 miles
%error= actual-estimate/ actual*100
%error=35/ 485*100
%error=0.072*100
%error=7.2%
Thus ;
Add both sides x
Add both sides 1
Divide both sides by 3
Subtract both sides x
There u go ...
10 x 2/3 = 20/3 or 6 cups and 2/3
x = 8, y = 2
Multiply the second equation by -2:
x + 6y = 20
-2x - 6y = -28
Add the equations and simplify:
-x = -8
x = 8
Plug x = 8 back into the first equation and solve for y:
8 + 6y = 20
6y = 12
y = 2