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taurus [48]
2 years ago
9

3.1 - 3.9n - 2n + 6 = I know it's a simple question I just keep forgetting how to do things.

Mathematics
2 answers:
Tanya [424]2 years ago
7 0
-5.9n+9.1
step by step explanation
Sliva [168]2 years ago
3 0

Answer:

-5.9n+9.1

Step-by-step explanation:

3.1 - 3.9n - 2n + 6=

Combind like terms

Step 1: -3.9 - 2n=-5.9n

Step 2: 6 + 3.1=9.1

Combine:

-5.9n+9.1

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Pretest 5. In a group of 250 students, 40 are seniors. What percentage of the group are seniors?​
zvonat [6]

Answer:

\%seniors = 16\%

Step-by-step explanation:

Given

Students = 250

Seniors = 40

Required

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This is calculated as thus;

\%seniors = \frac{Seniors}{Students} * 100\%

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\%seniors = \frac{4000\%}{250}

\%seniors = 16\%

8 0
3 years ago
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Answer:

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5 0
3 years ago
would someone be able to explain to me how to solve these problems? I don't need the solutions, I just need an explanation. I ne
Leni [432]
The first 3  are examples of the difference of 2 squares so you use the identity 
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multiply first coefficient by the constant at the end 
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now factor by grouping 
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3 years ago
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