Answer:
2
Step-by-step explanation:
38 total students
5 like neither one, so 38 - 5 = 33
22 plus 13 is 35, but only 33 students like one of them, so 35 - 33 = 2 extra votes, which means 2 like both.
If two chords intersect in a circle, then the products of the measures of the segments of the chords are equal.
I'm assuming that number up top is an 8. It's kind of blurry.
Since ten is a chord, and x is a segment of it, it can be expressed as x and 10 - x.
3(8) = x(10 - x)


(x - 6)(x - 4) = 0
x - 6 = 0 .... x - 4 = 0
x = 6 .... x = 4
4 or 6
8 students can be in a row.
If the same amount of students must be in each row across the grades, determine their greatest common factor. That would be 8 (8*2=16, 8*3=24). Any more than that, and the rows are uneven. There can be a max of 8 people in a row (2 rows for 6th grade, and 3 rows for 7th)
Hope it helps! I can explain further if needed