Answer:
length = 78 m , width = 27 m
Step-by-step explanation:
let w represent width then length l = 3w - 3
the perimeter (P) is calculated as
P = 2l + 2w = 210 , substitute values
2(3w - 3) + 2w = 210 ← distribute parenthesis and simplify left side
6w - 6 + 2w = 210
8w - 6 = 210 ( add 6 to both sides )
8w = 216 ( divide both sides by 8 )
w = 27 and l = 3(27) - 3 = 81 - 3 = 78
Then length = 78 m and width = 27 m
Yes, because the sample is random. If she had chosen the participants in any way other than randomly, it would not be representative of her entire school.
Answer:

Decimal Form:

Step-by-step explanation:

Remove Parentheses: 

Multiply the numbers: 

Divide both sides by: 

Simplify:

Hope I helped. If so, may I get brainliest and a thanks?
Thank you, have a good day! =)
Answer:
Option A
Step-by-step explanation:

we start with 12 red marbles out of 25 marbles, that's the probability for the first.
in the second step we have one red marble less, wich also means one marble less overall
and so on


can be reduced by 1320 (step by step) to

Answer:
adding and subtracting decimals is similar to adding and subtracting decimals because for both you add and sub both #s
Step-by-step explanation: