If a = 69 inches, b = 70 inches, c = 40 inches, and d = 66 inches, how much fabric is needed to make the tent?

This doesn’t make sense to me it’s supposed to be lcm ( least common multiple )

What is the product? (x2+3y+7) [yy+1)

Mr. brettler is hanging up a 5-foot tall rectangular welcome sign in the gym. he has drawn a sketch on a coordinate grid. he has the lower vertices of the sign at (9, –3) and (–6, –3). where would the upper vertices be on the grid?