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GalinKa [24]
3 years ago
6

R.

Mathematics
1 answer:
Furkat [3]3 years ago
6 0

Answer: A IS CORRECT

Step-by-step explanation:

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Find S25 for (-7) + (-2) + 3 + 8 +...
elena-14-01-66 [18.8K]
a_1=-7 \\ a_2=-2 \\  \\ d=a_2-a_1=-2-(-7)=5 \\  \\  \\ S_{25}= \cfrac{2(-7)+(25-1)5}{2}\cdot25 = \cfrac{-14+120}{2}\cdot25 =\cfrac{106}{2}\cdot25 =1325

Your answer is B. 1325
3 0
3 years ago
What is the scale factor?
fgiga [73]

Answer:

2

Step-by-step explanation:

Basically you don't need to find x to know the scale factor ,

but I did.So you see that multiple 3 by 2 you will get 6

(MN) and the same will happen with 5.5 and NO (which is 11 btw).

so you can write 2:1

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4 years ago
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Here are the steps on how I did it.

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3 years ago
A study by Allstate Insurance Co. finds that 82% of teenagers have used cell phones while driving. Suppose a random sample of 10
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Answer:

Step-by-step ex

6 0
3 years ago
In △CDE , CD=12 , DE=5 , and m∠E=83∘ .<br><br> What is m∠D to the nearest tenth of a degree?
mr_godi [17]

Answer:

As law of sin:

CD/sinE = DE/sinC

Then

12/sin83 = 5/sinC

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sinC = 5*sin83/12 = 0.413

Then

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Then

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Hope this help, bro!

3 0
3 years ago
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