Answer:
23-5= 18
Step-by-step explanation:
The formula for triangle area is b•h/ 1/2. so you would do 12•5=60. then divide that by 2 to get 30
Answer: 2 bookcases.
Step-by-step explanation:
Let be "x" the number of bookcases that the custodian will be able to repaint completly with 5 gallons of paint.
According to the data given, the custodian needs 2 gallons of paint to repaint one bookcase. Since all the bookcases are equal, you can set up the following proportion:

Now you must solve for "x" in order to find its value:

Notice that the custodian will be able to repaint 2 bookcases completely, then you can say that:
