Answer:
A. 6 hours
B. No students studied for 6 hours
C. 4 students
(I’m just using a educated guess for B)
Answer:

Step-by-step explanation:
<em>Hey there!</em>
Well angles like 142 and 2x + 22 equal each other because they are across from each other.
So we can set up the following,
142 = 3x + 22
Single out x
-22 to both sides
120 = 3x
Divide both sides by 3
x = 40
<em>Hope this helps :)</em>
Answer: $32
Step-by-step explanation:
Let's say we have a parallelogram that has sides of 2 and 3
perimeter = 2 * (side1 + side2)
perimeter = 2 * (2 + 3)
perimeter = 10
If the sides are increased by a factor 4, the sides are 8 and 12
perimeter = 2 * (side1 + side2)
perimeter = 2 * (8 + 12)
perimeter = 40
The perimeter increases by a factor 4.