URGENT- A rectangle has an area of 210 cm 2 and a perimeter of 58 cm. What are its dimensions? (show work)

L= 29-b

Step-by-step explanation:

A=210cm^2

A= L*b

210= (29-b) b

210= 29b-b^2

b^2-29b+210=0

b^2-15b-14b+210=0

b(b-15)-14(b-15)=0

(b-15)(b-14)=0

R=14 B=15

P-58cm

p=2(l+b)

58=2(l+b)

29= l+b

L= 29-b

answer: -2+√x,-2-√x

i hope this , i don't know if you're looking for a pair or not.

c.

step-by-step explanation:

because first you have to add the 4x, 9x, and the 7x together and you get 20x and then you add the last numbers up and you get 5and then you put the subtraction sign in there and that's how you get the answer.