Answer:
A
Step-by-step explanation:

Answer:
A) 3.5
16 shovels full
Step-by-step explanation:
9x + 13 = 17x - 15
8x = 28
x = 3.5
20 + 5x = 32 + 4.25x
0.75x = 12
x = 16
To add a negative and a positive I usually just subtract them so ex: -5+4=-1
and to subtract them I add the numbers together so -5-4=-9 so its basically the opposite
So you expect 16 people to come and estimate each person will eat 3 slices each. And each pizza has 12 slices. You would multiply 16 x 3 to figure out how many slices in total and get 48. 48 divided by 12, which is the amount of slices per pizza, equals 4. You should order 4 pizzas. Hope that helped, love!