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Free_Kalibri [48]
3 years ago
8

Could someone please help me solve this problem?

Mathematics
2 answers:
laiz [17]3 years ago
5 0

Answer:

7 + 2n = -11     -Subtract 7 from both sides

7 - 7 + 2n = -11 - 7

2n = -18                    -Divide both sides by 2.

2n / 2 = -18 / 2

n = -9

Hope this helps you!

-Mikayla

Iteru [2.4K]3 years ago
4 0

Hello!

<u><em>Answer:</em></u>

<u><em>n=-9</em></u>

<u><em>*The answer must have a negative sign.*</em></u>

Step-by-step explanation:

First, you subtract by 7 from both sides of an equation.

7+2n-7=-11-7

Then, you simplify.

2n=-18

Next, you divide by 2 from both sides of an equation.

\frac{2n}{2}=\frac{-18}{2}

And finally, simplify and solve. You can also dividing into the groups.

18/2=9

n=-9

Hope this helps!

-Charlie

Have a great day!

Thanks!

:)

:D

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Sarah has a brother who is 5 years younger than herself and another brother who is 8 years younger than herself. She observes th
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Answer:

Sarah is 13 years old

Step-by-step explanation:

Represent Sarah's age with S

Her first brother's age with F

Her second brother's age with B

So, we have:

From the first statement, we have:

S - F = 5 ---- (1)

From the second, we have:

S - B = 8 ---- (2)

The product of their ages is 40.

First, we make F the subject in (1) and B the subject in (2)

F = S - 5

B = S - 8

Their product is represented as follows:

F * B = 40

Substitute values for F and B

(S - 5) * (S - 8)=40

Open bracket

S^2 - 5S -8S + 40 = 40

S^2 - 13S + 40 = 40

Subtract 40 from both sides

S^2 - 13S = 0

Factorize:

S(S - 13) = 0

Split:

S = 0 or S - 13 = 0

But Sarah's age can't be 0 because she has two younger brothers.

So, we stick to

S - 13 = 0

Make S the subject

S = 13

<em>Hence, Sarah is 13 years old</em>

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3 years ago
A 12ft ladder leans against the side of a house. The bottom of the ladder is 6ft from the side of the house. How high is the top
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Step-by-step explanation:

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