Question

yesterday grace drove 28 1/2 miles she used 1/4 gallons of gasoline.what is the unit rate for miles per gallon

Answer 1

MPG= 30 4/5 or 30.8 is I think is the answer.

Answer 2

Answer:

$unit\ rate=114 \frac{miles}{gallon}$

Step-by-step explanation:

Hello, I think I can help you with this

remember some properties of mixed numbers

$a\frac{b}{c}=\frac{(a*c)+b}{c}\\ example\\3\frac{1}{5}= \frac{(3*5)+1}{5}=\frac{16}{5}$

Step 1

covert 28 1/2

a=28

b=1

c=2

$a\frac{b}{c}=\frac{(a*c)+b}{c}\\28\frac{1}{2}= \frac{(28*2)+1}{2}=\frac{57}{2}=28.5$

Hence, the distance she drove is 28.5 miles

Step 2

find the  number of gallons

$\frac{1}{4}=0.25$

then, she used 0.25 gallons to travel 28.5 miles

Step 3

find the unit rate for miles per gallon

$unit\ rate=\frac{number\ of\ miles}{number\ of\ gallons}\\ unit\ rate=\frac{28.5\ miles}{0.25\ gallons}\\unit\ rate=114 \frac{miles}{gallon}$

Have a great day.