Express the formula P=21 +2W in terms of the length, l. Use the new formula to find the new length when the perimeter is 68 and the width is 13.

answer: its because of life

step-by-step explanation: i dont know

yes

step-by-step explanation:

so of course you want to start by plugging the 5 in which goes to 7(5)+3(5)=50 because 7*5=35 and 3*5=15 and then add them together, then plug in the 5 to the other equation as well 9(5)+5=50 because 9*5= 45 and then add 5 and so yes they are equivalent.

150

step-by-step explanation:

(sorry i'm not typing it again just read the other two explanation sections i just typed it'll be the same.)

77

step-by-step explanation: