Answer:
It equals 3, but if you add two negatives inside of the parenthesis, then it equals -19.
Step-by-step explanation:
You have to plug in the numbers where the variables are, so it would be -8-(-11).
Answer: 
Step-by-step explanation:
Given: Fraction of 7th graders got A = 
Fraction of 7th graders got B = 
The fraction of the students got an A or B = Fraction of 7th graders got + Fraction of 7th graders got B

Hence, the required fraction: 
Hey there!!
Given equation :
d(e-f) = g
Solve for d :
Dividing by ( e - f ) on both sides :
d = g / e - f which is 
Hope my answer helps!
180-15=165
15x=165
165/15
x=11