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2 years ago

Subtract (2x3 + 9x − 8) − (4x2 − 15x + 7).

2 answers:

7 0

2x^3 + 9x - 8 - (4x^2 - 15x + 7)....distribute thru the parenthesis
2x^3 + 9x - 8 - 4x^2 + 15x - 7....combine like terms
2x^3 - 4x^2 + 24x - 15 <==

Charra [1.4K]2 years ago

5 0

Distribute invisible -1

-1(4x^2-15x+7)=-4x^2+15x-7

now we have
2x^3+9x-4x^2+15x-7
group like terms

2x^3-4x^2+9x+15x-8-7
add
2x^3-4x^2+24x-15

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Step-by-step explanation:

The question illustrates an exponential function

$y = ab^x$

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$y = 1000$

Substitute $y = 1000$ , $b = 3$ and $a = 1$

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$Log1000 = Log3^x$

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$Log1000 = xLog3$

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$x = \frac{Log1000}{Log3}$

$x \approx 6$

<em>Hence: It takes 6 days</em>

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