Answer:
<u>| </u><u>Music | World Language | Total </u><u> </u>
<u>8th grade</u><u> | 30 | 35 | 65 </u>
<u>7th grade</u><u> | 5 | 30 | 35 </u>
Total | 35 | 65 | 100
The expression written as an algebraic expression is 14x+10
Answer:
or 
Step-by-step explanation:
we know that
Applying the law of cosines

In this problem we have

c is the length of the third side
Substitute




or 
PQ = 2 units
height = 4 units
area = 2*4 = 8/2 = 4 square units