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4 years ago

What is the factorization of the trinomial below? -x2+ x + 42

Mathematics

1 answer:

Greeley [361]4 years ago

8 0

Answer:

-(x + 6)(x - 7)

Step-by-step explanation:

The expression that we have can also be expressed in the following way:

- (x ^ 2 - x - 42)

Now to factorize we must find two numbers that multiplied by -42 and the sum of these numbers by -1.

these numbers are: -7 and 6

-7 * 6 = -42

-7 + 6 = -1

Thus:

- (x + 6) (x - 7)

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find the value of k so that the lines that pass through the following points are parallel: line 1: (0,3) and (-2,4) and line 2:

slamgirl [31]

For lines to be parallel, the slopes have to be the SAME.

To find the value of k, you can first find the slope of line 1 using the slope(m) formula, and plug in the points:

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$m = \frac{4-3}{-2-0}$

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Now that you know the slope, you can use the slope formula to find k by plugging in what you know:

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$-\frac{1}{2} = \frac{7-(-1)}{5-k}$ Multiply (5 - k) on both sides

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k = 21

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Cerrena [4.2K]

Answer

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Step-by-step explanation:

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sesenic [268]

Answer:

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Step-by-step explanation: The rate you are given is 30 donuts every 30 minutes. This equals 30/15.

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boyakko [2]

$\frac{x^{0}*y^{-3}}{x^{2}*y^{-1}} = \frac{1}{x^{2}*y^{3-1}} = \frac{1}{x^{2}*y^{2}}$

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