Answer:
In the 9th grade are 375 students
Step-by-step explanation:
To solve this problem we are going to represent the data they give us through an equation
a = perfect attendance = 142
t = total = x
(x * 2/5) - 8 = a
Now that we have the equation we simply have to solve for the x which is what we want to know
(x * 2/5) - 8 = a
(x * 2/5) = a + 8
x = (a + 8) / (2/5)
Now that we clear the x we replace the values we know (a = 142)
x = (a + 8) / (2/5)
x = (142 + 8) / (2/5)
x = (150) / (2/5)
x = 375
In the 9th grade are 375 students
