Question

June bought ​ 3 1/2 ​ gallons of white paint at $17.50 per gallon and ​ 1 3/4 gallons of blue paint at $19.00 per gallon. What was her total cost?

Answer 1

3 1/2 gallons of white paint is 61.25 1 3/4 gallons of blue paint is 33.25 so the total is 94.50 dollars

Answer 2

Step 1

Convert mixed numbers to an improper fractions

$3\frac{1}{2} =\frac{3*2+1}{2}= \frac{7}{2}$

$1\frac{3}{4} =\frac{1*4+3}{4}= \frac{7}{4}$

Step 2

Find the total cost

we know that

the total cost is equal to the cost of the gallons of white paint  plus the cost of the gallons of blue paint

the cost of the gallons of white paint is equal to

$\frac{7}{2}*17.50= \ 61.25$

the cost of the gallons of blue paint is

$\frac{7}{4}*19.00= \ 33.25$

The total cost is

$\ 61.25+\ 33.25=\ 94.50$

therefore

the answer is

the total cost is $\ 94.50$