Answer:
1 .Each classroom contains 20 students so we multiply it times 8
90% of (20x8).
90\100 x 160
9x16 students
144 students
Answer:

Step-by-step explanation:
you combine like terms and set equal to zero you get
then subtract the 10 and divide by 50 it would give you a
which simplifies to be 
Hello do 9+46=684 there you go to find sum 69
Answer:
y = 4x + 16
Step-by-step explanation:
y - 1 = 4(x + 3)
Has a slope of 4
y = 4x + c
32 = 4(4) + c
32 - 16 = c
c = 16
y = 4x + 16