X represents the number that would be added to the silver cars.
x/40= 4
X=40x4
x=160
Subtract the given 20 from 160 because 160 is the total number
160-20=140
Therefore 140 would be added to 20 silver cars to get the ratio1:4
13.25x3-(8.50x3)=x x is the cost of the system
Gradient =2 because the slope is 2 units. Y-intercept = -2 because it crosses the y-line at -2.
Answer:
4 and 9 hundreths
Step-by-step explanation:
