Sadie computes the perimeter of a rectangle by adding the length, l , and width, w , and doubling this sum. eric computes the perimeter of a rectangle by doubling the length, l , doubling the width, w , and adding the doubled amounts. (a) write an expression for sadie's way of calculating perimeter. write a different expression for eric's way. (b) use both of the expressions to find the perimeter of a rectangle with length 30 and width 75.

a) P = 2(l+w)  Sadie

 P =2l+2w  Eric

b)  Sadie : P = 2(30+75) = 2(105) = 210

Eric: P = 2(30) +2(75) = 60+150 =210

the equation cos(35) =a/25 can be used to find the length of bc what is the length of bc? round to the nearest tenth

step-by-step explanation:

false

step-by-step explanation:

false.   two legs of the trapezoid would be congruent, but the other two would not.   were all the legs congruent, then we'd have a square; were the 2 shorter sides congruent and the 2 longer sides also congruent, we'd have a rectangle.