Find the surface area

210.6

Step-by-step explanation:

Area of  bottom triangle = bh/2 = 9(7.8)/2 = 35.1

Measure of 1 lateral face = 13(9)/2 = 58.5

Total measure of all 3 lateral faces = 3(58.5) = 175.5

Surface area = 35.1 + 175.5 = 210.6

7

step-by-step explanation:

i'm assuming you need to figure out how many campers go into each tent.

i got the answer by:

24+4=28

28/4=7  

exa:

)

3+11

14

step-by-step explanation:

from this example, we can see that subtracting with integers is the same as adding the opposite. we can solve using a number line or by using the saying "keep, change, change" to us solve. it is important to remember that we can subtract a negative and end up with a larger number than we started with.