Ababy weighs 18 pounds at her four month appointment. six months later she weighs 24 pounds. by what percentage did the baby's weight increase?

The baby's weight increase 33.33%

Step-by-step explanation:

we know that

A baby weighs 18 pounds at her four month appointment

Six months later she weighs 24 pounds

so

18 pounds represent the 100%

using proportion

Find out what percentage represent the increase (24-18)=6 pounds

Let

x ----> the percentage increase

the percentage is 33.33%

Step-by-step explanation:

The initial weight is 18 pounds and is what we will define as the 100%.

The later weight is equal to 24 pounds.

The direct difference is 24 pounds - 18 pounds = 6 pounds, now, we want to know wich percentage the 6 pounds represent:

the percentage of the weight increase equal to the fraction between the difference and the initial weight:

X  = (6/18)*100% = 33.33%

So the weight of the baby increase an 33.33%

to find the perimeter of the rectangle this is the expression:

x-9+x-9+3x-4+3x-4=138

if we simplify it:

8x-26=138

remember, 138 is what it all adds up to

the length is 11.5cm

the width is 57.5cm

the area is 661.25cm^2

the answers might not be correct use at own risk

yes

step-by-step explanation:

yes