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In-s [12.5K]
4 years ago
5

7x+3-5x+8+4x-1 i need help with this

Mathematics
2 answers:
dedylja [7]4 years ago
7 0

We are trying to simplify the expression 7x+3-5x+8+4x-1

Simplify by like terms- like terms are numbers with the same variable to the same degree (ex. 5x and 28x, 3x^{2} and 7x^{2}, 3xy and 9xy) and also all constants are like terms (normal numbers ex. 9, 189, 3, -2)

So lets rearrange this equation

7x-5x+4x+3+8-1

Remember to bring along the negative or positive sign (don't think it as subtracting 5x, think of it as negative 5x)

All the numbers with x are like terms and a constants are like terms. So combine.

6x+10 is the simplified expression


Elza [17]4 years ago
6 0

You would simplify the like terms:

6x+10

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Answer:

B

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The figures are similar. Give the ratio of the perimeters and the ratio of the areas of the first figure to the second.
pickupchik [31]

Answer: first option.

Step-by-step explanation:

The ratio of the area of the triangles can be calculated as following:

ratio_{(area)}=(\frac{l_1}{l_2})^2

Where l_1 is the lenght of the given side of the smaller triangle and l_2 is the lenght of the given side of the larger triangle.

Therefore:

ratio_{(area)}=(\frac{28}{32})^2=\frac{49}{64}

It can be written as following:

ratio_{(area)}=49:64

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5 0
3 years ago
PLEASE HELP!
Kitty [74]
You can reword the two equations as:

-5x-y=15 (Divide original value by 3)
-2x+6y=6

Then use elimination to find x:

-30x-6y=90 (Multiply by 6 to get y values to be same to cancel out)
-2x+6y=6

You're left with:

-32x=96. Which can then be solved to find x which is -3.

Then plug back in 

-2x+6y=6

Now to: -2(-3)+6y=6.

Which reduces to 6+6y=6. So y=0.



To graph them, just reword the equations (yes once again) so that y is in front.

y=-5x-15 and y=(1/3)x+1






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1.572x100x
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