Answer:
25 miles per gallon just look at the graph and simplify the slop of 50/2
for 9 gallons, 225 miles
multiply the rate by the # of gallons:9*25
I think the answer for the first one is 3 I am not sure about the second one
3y √21 + 2 y√15
Step-by-step explanation:
To simply, we open up the bracket
We have this as;
√(189y^2) + √60y
= 3y √21 + 2 y√15
, you end up with the differentials 
. Multiplying both sides by 2 gives 
.