Thomas jenkins wanted to build a deck off the back door of his new home, with a length of 21 feet and a width that is one foot less than the length. he did not have enough money for this size deck, so he was forced to cut the size of the deck (the area) in half. he did this by reducing the length and width by the same amount, represented by x. what is the length of the new deck, in feet?

i think, not  sure its a hard one 41 feet

Step-by-step explanation:

i added 21 and 21 then 20 and 20 which equals 82 then divided by 2x

i think it is everything has to equal 180 so, if i correct 4=c. 6=d. 8=a. 7=b. and the last question would be c. because they are parallel lines and they are congruent.

step-by-step explanation:

the reason everything has to equal to 180 is because that is how it works. i'm guessing that is its rule. 4 and 8 are congruent and parallel so, that would be 30+30 because they have the same number. it would equal 60. 6 and 7 are congruent and parallel so, that would be 30+30 because they have the same number. it would equal 60. 60+60 is 180. so, now you have your answer