The diagonals ac and bd of the convex quadrilateral abcd with area 28 intersect each other at point o. the lines which are parallel to the diagonal ac come through the midpoints of segments bo and do . find the area of the portion of the quadrilateral that is between those lines.

21

Step-by-step explanation (note, the suggested way is not the shortest one):

all the details are in the attached picture.

answer: -2+√x,-2-√x

i hope this , i don't know if you're looking for a pair or not.

sinn is the total amount of students now and m were the students before, you subtract them both (n-m) and divide that by m. then, since to get a percentage from a fraction you have to multiply by 100, your answer should look like this: n-m/m*100

step-by-step explanation: