**Answer:**

10

**Step-by-step explanation:**

The first thing to do would be to find how many 1/4 cups are in the 1 cup. Divide 1 by 1/4 and you'd get 4.

Just multiply 2 1/2 by 4 and you get 10

N - number of students

7n/8 - n/8 = 72

6n/8 = 72

n = 96

Check the picture below

the triangles are similar, the angles are congruents then

so... just add them up, and divide by 2, or set them as rational

First you need to find the amount of money the discount decreased.

10(0.2)=2

Then, in order to find the sale price you need to subtract the discount price from the original price of the burger.

10-2=8

Answer: $8

**Step-by-step explanation:**

Statements

1.RS tangent to circle A and circle B at point R and point S

2.AR is perpendicular to RS, BS is perpendicular to RS

3.AR is parallel to BS

Reasons

1.Given

2.Radius are perpendicular to tangent

3. 2 lines perpendicular to the same line are parallel to each other