Answer:
The total amount you will spend on the paint=$34
Step-by-step explanation:
Step 1: Determine total area of walls
The total area of walls=Area of wall 1+area of wall 2+area of wall 3+area of wall 4
where;
area of wall 1=(15×9)=135 ft²
area of wall 2=(15×9)=135 ft²
area of wall 3=(18×9)=162 ft²
area of wall 4=(18×9)=162 ft²
replacing;
Total area of walls=(135×2)+(162×2)=594 ft²
Total area of walls=594 ft²
Step 2: Number of gallons of paint needed
Use the expression;
Total area of walls=area per gallon cans×number of gallon cans needed
where;
total area of walls=594 ft²
area per gallon=400 ft²
number of gallons=n
replacing;
594=400×n
n=594/400
n=1.485
Total number of gallon cans=1.485=2 gallon cans
Step 3: Total cost
The total cost of painting can be expressed as;
Total cost=cost per gallon can×number of gallon cans needed
where;
Cost per gallon=$17
number of gallon cans needed=2
replacing;
Total cost=(17×2)=$34
The total amount you will spend on the paint=$34
