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Naya [18.7K]
2 years ago
9

Simplify the following expression 8x+9-6x-7

Mathematics
2 answers:
kiruha [24]2 years ago
6 0
1) both 8x and -6x are the same form - they’re just a coefficient with a variable, while 9 and -7 are just plain numbers. move the expression around as shown in the picture: 8x - 6x + 9 - 7. now coefficients with variables are next to each other, while plain numbers are next to each other, making it easier to solve.
2) now solve: 8x - 6x is 2x, and 9 - 7 is 2. now you have 2x + 2, which is the final answer.

i don’t know if i explained it very well, but if you look at the picture you should be fine.
mamaluj [8]2 years ago
4 0
8x + -6x = 2x 2 + 2x
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frez [133]
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3 years ago
Mathwiz wya?? pic below i need help asap
n200080 [17]

Answer:

Step-by-step explanation:

First, you gotta work out the hypotenuse of ABC, which is AC.

To do that, you need to figure out the scale factor between the two right-angled triangles. You can do that for this question because this is a similar shapes question.

12.5/5 = 2.5

The scale factor length between the two triangles is 2.5.

You can use 2.5 now to work out AC, so AC would be 13 x 2.5, which gives 32.5.

Now that you've got the hypotenuse and BC of ABC, you can use Pythagoras's theorem to work out the length of AB

Pythagoras's theorem = a^2 + b^2 = c^2

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b^{2} = 1056.25 - 156.25

b = \sqrt{(1056.25 - 156.25)}

b = \sqrt{900}

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Perimeter of ABC = AB + BC + AC

= 30 + 12.5 + 32.5

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8 0
2 years ago
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mixer [17]

Answer:

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Step-by-step explanation:

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