I think that this an example of a paired t test. Since each student (subject) is given 2 treatments of the same material.
Given:

To find:
The value of x.
Solution:
We know that, corresponding sides of similar triangles are proportional.
Since,
, therefore

On substituting the values from the figure, we get


On cross multiplication, we get




Therefore, the value of x is 4.
Answer:
B and C. can you select more than one?
Answer:
Step-by-step explanation:
y+5 = ¾(x+4)
Answer:
43,200
Step-by-step explanation: