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goldenfox [79]
4 years ago
11

The formula P = 21 + 2w means that the perimeter of a rectangle is equal to twice the sum of its length and its width

Mathematics
1 answer:
emmainna [20.7K]4 years ago
4 0

What are you asking.


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I need help with #8 and #9 Please! :)<br> I will mark as brainliest!
k0ka [10]

Answer:

see explanation

Step-by-step explanation:

(8)

the common ratio r,  of a geometric sequence is

r = \frac{a_{2} }{a_{1} } = \frac{a_{3} }{a_{2} } = ......

r = \frac{\frac{1}{32} }{\frac{1}{256} } = \frac{\frac{1}{4} }{\frac{1}{32} } = 8

(9)

The simplest way to evaluate the sum is to substitute k = 3, 4, 5, 6 into each term and sum them

(- 9 + 20) + (- 12 + 20) + (- 15 + 20) + (- 18 + 20)

= 11 + 8 + 5 + 2 = 26


6 0
4 years ago
A letter that represents an unknown number is
Ganezh [65]
Hey there! Hello!

I believe what this question (more of a statement) is asking is to identify what a letter that represents an unknown number is called. Most of the time, i refer to it as just a variable, or an unknown variable. It can also be referred to as just an unknown value. 

Feel free to ask me any additional questions if you have any! :-)
8 0
3 years ago
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What is 1178 divided by what equalls 19
MA_775_DIABLO [31]
22382. You just multiply 1178 and 19 :-)

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Answer: ummmmmmm

Step-by-step explanation: teeeeeheeee

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If you have 8/12 of pizza, how many thirds do you have?
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8/12 is equivalent to 2/3.

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