Answer:
B
Step-by-step explanation:
The function d(t) represents the distance traveled by the train after t hours. d(5) is the total distance traveled by the train after 5 hours, which means 6:00 pm. The d(2) is the total distance traveled by the train after two hours, 3:00 pm. The expression d(5) - d(2) represents the total distance traveled by the train from 3:00 pm to 6:00 pm or for traveling at a constant speed for 3 hours.
<u>Ms. Amani:</u>
7 pencil cases
9 packs of folders
<u>Mr. Blake</u>
9 boxes of crayons
<u>Prices:
</u>Pencil case: $3
Box of crayons: $4
Pack of folders: $2
<u>
Ms Amani
</u>7 x 3= 21
9 x 2 = 18
21+18= $39
<u>Mr. Blake</u>
9 x 4= $36
39-36 = $3 difference.
<u>
</u>
Answer:
38 ft.
Step-by-step explanation: (12 x 2) + (7 x 2) = 38 ft.
