(5 + 6)3 would represent what you want.
Answer:

Step-by-step explanation:
Given


Required
The cost of units used
First, calculate the number of units used.



Next, multiply the units used by the cost per units,
Since the cost per unit is not given, we assume that it is x.
So, the total cost is:



Answer:
42 boys can count (given)
P(boy & can count) = 0.35
Step-by-step explanation:
P(boy who can count) = 42/120
7/20 = 0.35
Answer: I think it is 1572 sq feet
Step-by-step explanation:
Lxwxh
14x13x9=1638
Window is 4x4.5=18
Door 1 is8x3=24
Door 2 8x3=24
Since the doors and window are not included in what was painted you need to subtract those totals from the room.
So, 1638-18=1620
1620-48(two doors)=1572 sq feet