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3 years ago

Alana incorrectly simplified the expression (-14a + 12) - (-10a + 13) as -24a + 25 describe her error

Mathematics

1 answer:

ICE Princess25 [194]3 years ago

7 0

Answer:

The answer should be -4a-1. This is because you have to open the box.

-(-10a+13)

Two negatives become positive so she should have had -14+10 to make -4 and 12-13 to make -1. A negative and positive together, the negative always wins so that why you subtract.

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eduard

1) Factor the equation first:

$2e^{2x} + 4xe^{2x} = 0$
$e^{2x}(2 + 4x) = 0$

So either $e^{2x} = 0$ or $2 + 4x = 0$ . But $e^{2x} = 0$ can never equal 0! So, we only need to solve for the second equation:

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$\bf x = {-\frac{1}{2}}$

2) First, single out the term with the exponent:

$2 + 3(4^{2x - 1}) = 43$
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Now, taking the log base 4 of each side gives us

$2x - 1 = \log_4 \frac{41}{3}$

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$2x - 1 = \log_4 \frac{41}{3}$
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$x = \frac{1}{2} \log_4 \frac{164}{3}$
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