Please help I'm in fourth and I do not understand this at all :((

Step-by-step explanation:

to under stand this think of a rectangle, or square.  that's the yard, then

we know the total area of that rectangle or square,  some how.  :/  they just tell us,  then   they tell us the length , or one side of our rectangle or square.

we just have to find the other side.

area of yard (rectangle) = Length *  Width

area = L * W

81 = 12 * W

use your algebra skills...  ( my calculus prof. tells us that we are all bad at it :))

81/12 = W

6.75 = W

the width of the yard is 6.75 meters

step-by-step explanation:

b. 153 students do not participate in sports and seventy-five 12th graders were surveyed