Answer:
see the explanation
Step-by-step explanation:
Let
x ------> the next grade
we know that
To find the average grade sum the grades by the number of math test
so
[tex]60=\frac{(88+94+92+98+x)}{5}[/tex]
solve for x
Combine liker terms in the right side
[tex]60=\frac{(372+x)}{5}[/tex]
Multiply by 5 both sides
[tex]300=372+x[/tex]
Subtract 372 both sides
[tex]300=372+x[/tex]
[tex]x=-72[/tex] -----> this is not make sense
The grade cannot be a negative number
so
For x=0
The minimum average grade is
[tex]\frac{(372)}{5}=74.4[/tex]
