2 years ago

Help me i don'tunderstand please

Mathematics

1 answer:

PIT_PIT [208]2 years ago

4 0

Step-by-step explanation:

using SOH CAH TOA.

h=3.46 and b=4.42

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Helga [31]

Answer:

The step 4 is not what he should have done. But the wrong is step 5, because if he added -2x both sides, it would give the following equation:

$x-12=-4x+6$

and not $x-12=6$

Note that in step 4 he should have added 2x and not -2x to both sides, but we still have the equality. The problem is that step 5 is totally wrong.

I don't know what answer is expected to this question, but I would mark step 5, because this is mathematically wrong.

Solving the equation

$3(x-4)=-4-2(x-5)$

Using distribution

$3x-12=-4-2x+10\\3x-12=-2+6$

Add $2x$ both sides

$3x-12+2x=-2x+6+2x$

$5x-12=6$

Add 12 both sides

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Divide both sides by 5

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Answer: B 15 units

Step-by-step explanation:

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