Answer:
9
Step-by-step explanation:
there are 6 groups of 3 students, that is
number of students = 6 × 3 = 18
They each sell the same number of balloons, thus
= 9 balloons each
So the equation of the line that passes through (3, 1) and (0, 10) is y=-3x+10
(3, 1) and (0, 10)
m=y²-y¹/x²-x¹
m=10-1/0-3
m=9/-3
m=-3
y=mx+b
y-y=m(x-x1)
y-1=-3(x-3)
y-1=-3x+9
+1 +1
y=-3x+10
No solution
X=13
