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OLEGan [10]
2 years ago
14

Simplify 2(-n-3)-7(5+2n)

Mathematics
2 answers:
fredd [130]2 years ago
7 0

Answer:

-16n - 41

Step-by-step explanation:

To simplify the equation, you need to get rid of the parentheses by multiplying the numbers outside the parentheses to the numbers inside. Then, you can combine the similar terms.

2(-n - 3) - 7(5 + 2n)                         <---- Original equation

-2n - 6 - 7(5 + 2n)                           <---- Expand first parentheses by mult.

-2n - 6 - 35 - 14n                            <---- Expand second parentheses by mult.

-16n - 6 - 35                                    <---- Combine terms with "n"

-16n - 41                                          <---- Combine whole numbers

vodomira [7]2 years ago
3 0

Answer:-2n-29

Step-by-step explanation:2*-n=-2n

2*-3=-6

-7*5=35

-7*2n=-4n

2n-6-35-44n

2n-4n=-2n

6-35=-29

2n-29

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Barney is eight years older than Nemo. In seven years the sum of their ages will be 46. How old is Barney now?.
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Let's represent Nemo's age with an n.

Barney is 8 years older so his age is nemo's plus 8. That is, Barney's age is n + 8

In seven years they will each be the age they are now plus 7. So, Nemo will be n + 7 and Barney will be n + 8 + 7. If the sum of their ages will be 46 we know that when we add these expressions we should get 46, so let's set the sum to 46 and solve for n.

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