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3 years ago

-8n plus -4n equals-72

Mathematics

1 answer:

kvv77 [185]3 years ago

8 0

Answer:

The value of n in the given equation is 6

Therefore n=6

Step-by-step explanation:

Given expression is -8n+(-4n)=-72

To simplify the given expression as below :

-8n+(-4n)=-72

-8n-4n=-72

-(8n+4n)=-72

Dividing by (-) on both sides we get

8n+4n=72

12n=72 ( adding the like terms )

Dividing by 12 on both sides we get

$\frac{12n}{12}=\frac{72}{12}$

$n=6$

Therefore the value of n in the given equation is 6

Therefore n=6

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3 years ago

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a wire of length 200 cm is cut into two parts and each part is bent to form a square.If the area of the larger square is 9 times

diamong [38]

Answer:

The perimeter of the larger square is $150cm.$

Step-by-step explanation:

First of all, let one part of it be " $x$ "

and the other part of it " $200-x$ "

Now to solve this :

The area of the square = $L^2$

The area of one part of the square = $x^2$

The area of the other part of the square = $(200-x)^2$

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Now, add, $-4x^2$ to both the sides :

$9x^2-9x^2=40000-400x+x^2-9x^2\\-1(8x^2+400x-40000)=0$

Now, take out the "8" which is common :

$-8(x^2+50x-5000)=0$

Now, divide it by $-8$ :

$x^2+100x-50x-5000=0\\x(x+100)-50(x+100)=0\\(x+100)(x-50)=0\\$

$x=-100$ or $50$

So, now we know that :

One of the part is = $50cm$

And the other part is = $150cm$

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3 years ago

Help !!!!!!!!!!!!!!!!

umka2103 [35]

Answer:

13) 8.6

Step-by-step explanation:

To find the side length, use a trig function to solve for x.

You have the adjacent side and hypotenuse to the angle. Use the cosine function since its ratio is adjacent over hypotenuse.

This means Cos 52 = x / 14. Solve for x.

Cos 52 = x / 14

14* Cos 52 = x

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Answer:

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