Question

Perimeter of a rectangle. The width of a rectangle is three fourths of the length. The perimeter of the rectangle becomes 50 cm when the length and the width are each increased by 2 cm. Find the length and the width.

Answer 1

?

Answer 2

let x and y be length and width of the rectangel. y = 3/4 x
when x and y are increased by 2cm perimeter becomes 50 cm
50= 2 ( (x+2) + ( 3/4x +2) )
50 = 2 ( 7x/2 + 4)
50 = 7x + 8
7x = 42
x=6 length, width = 9/2 cm

Answer 3

thanks :)

Answer 4

Perimeter would equal 2L + 2W then P= 2*6 + 2*( 9/2) P=12+9=21 Shouldn't it be 50? What am I missing or is the solution wrong!

Answer 5

no idea lol copied it exactly out of my online book

Answer 6

hey radar could you try my other problem?

Answer 7

hey guys, perimeter will be 50cm when existing length and width are increased by 2 cm each

Answer 8

nagendra, could u look at my other one?

Answer 9

I have to go to work soon and Im stumped

Answer 10

where is the other one

Answer 11

starts with womens records...

Answer 12

8th one down

Answer 13

i'm sorry i made a small error in the previous one
50 = 2( 7x/4 +4 )
50 = 7x/2 +8
7x/2 = 42
x= 12, y = 9
please note the corrections

Answer 14

ok thanks :) could you check the other one out?

Answer 15

please copy it here

Answer 16

Women’s records in the women’s 1500-m run. The formula

R =−0.0026? + 4.0807

can be used to predict the world record, in minutes, for the 1500-m run t years after 1900. Determine (in terms of an inequality) those years for which the world record will be less than 3.8 min.

Answer 17

i posted it in the original post, is it ? or t

Answer 18

Thanks for info. It does check out now. I've been outside retrieving a boat that washed over the spillway.
P=2(12+2)+2(9+2)=28+22=50