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Mathematics
18.01.2020 11:03
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Who can help me out please I’ll mark brainliest

Who can help me out please I’ll mark brainliest
Who can help me out please I’ll mark brainliest
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becca3539
becca3539
4,6(99 marks)

7x + 12 = 9x - 6

7x + 12 - 7x = 9x - 6 - 7x

12 = 2x - 6

12 - 6 = 2x -6 - 6

6 = 2x - 12

6 + 12 = 2x

18 = 2x

18 \div 2 = x

9 = \bold{ x}

In pythagoras, c is the hypotenuse. That is AC. Where a is AB and b is BC.

{c}^{2} = {a}^{2} + {b}^{2}

{(6 x + 5)}^{2} = {(7x + 12)}^{2} + {BC}^{2}

{((6 \times 9) + 5)}^{2} = {((7 \times 9)}^{2} + 12)^{2} +{BC}^{2}

{(54 + 5)}^{2} = {(63 + 12)}^{2} + {BC}^{2}

{59}^{2} = {75}^{2} + {BC}^{2}

3481 = 5625 + {BC}^{2}

3481 - 5625 = {BC}^{2}

- 2144 = {BC}^{2}

\sqrt{ - 2144} = BC

leeney6166
leeney6166
4,5(47 marks)
I can help but what are you looking for like what type of answer are your factoring it ? Or some things else

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