PLEASE HELP & SHOW WORK , ITS URGENT

Mathematics

2 answers:

frosja888 [35]2 years ago

8 0

Answer:

I haven't gone this through yet but Ima help as much as possible. I know for sure you need to use the Area formula of Octagon and Perimeter and substitute the values. Once you substitute you gonna solve it like any other equation. I hope I helped ~

lara31 [8.8K]2 years ago

6 0

Answer:

D. 80 ft

Step-by-step explanation:

substitute the known values into the equation for area

a = 5

area = 200

$200=(5*P)/2$

multiply both sides by 2 which gives you

$400=5*P$

then divide both sides by 5 to give you

$80 = P$

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5 ( n - 7 ) = 2 ( n + 14 )

wariber [46]

Answer:

n=21

Step-by-step explanation:

We must find n.

Remember PEMDAS. First we must do the Parentheses. Lets do distributive property by multiplying a number that is immediately outside the parentheses with each number inside the parentheses. Lets do this one side at a time.

First lets do 5(n - 7). We get 5n - 35

Now 2(n + 14) is 2n + 28

Okay...... now we have $5n-35=2n+28$