1) 2x+3 = 5
-3 -3
2x =2
x=1
2) -x + 8 = 5
-8 -8
-x = -3
X=3
So the total number of students equals 8+17 = 25 students
Proportionally:

Thus,

boys out of the 100 students.
Answer:
slope is 3
Step-by-step explanation:
Slope = 
change in y = (13-7), (19-13), (25-19), (31-25)
change in y = 6
Change in x = (4-2), (6-4), (8-6), (10-8)
Change in x = 2
Therefore slope = 
Slope = 3
Prime number- a number that has only two factors.
Answer:
substitute x as 3
Step-by-step explanation:
f (3)=2x
=2×3
=6