Answer:
5
Step-by-step explanation:
This is a pretty simple question to answer, the one step that needs to be done is divide 78.5 by 15.7. You should come up with 5.
<span>46 <= grade < 96
First, let's write the equation for the lower limit that the student must get for a B.
(x + 92 + 82 + 88 + 92)/5 = 80
Multiply both sides by 5 giving
x + 92 + 82 + 88 + 92 = 400
Subtract 92, 82, 88, 92 from both sides
x = 400 - 92 - 82 - 88 - 92 = 46
So the student has to get 46 or higher on the test to make a B.
Now let's compute the upper limit
(x + 92 + 82 + 88 + 92)/5 < 90
Multiply both sides by 5
(x + 92 + 82 + 88 + 92) < 450
Subtract 92, 82, 88, 92 from both sides
x < 450 - 92 - 82 - 88 - 92 ) = 96
So the student has to get a grade of less than 96 to get a B.</span>
The expression for the number of sixth graders in terms of x is 
<h3><u>Solution:</u></h3>
Given that , 
of the students in school are in sixth grade
To find: Expression for number of sixth graders
Let the total number of students in school be "x"
From given statement,
of the students in school are in sixth grade
Which means, of total number of students are in sixth grade
Let "n" be the number of students in sixth grade
Then by given statement,
n = of total number of students
Thus the expression in terms of x is found
