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Anni [7]
2 years ago
9

Find the roots of this equation 7xsquare - 5x - 2 = 0

Mathematics
1 answer:
Sophie [7]2 years ago
7 0

Answer:

x = 1, -2/7

Step-by-step explanation:

You could use the quadratic equation but this can be factored into

(7x + 2) (x - 1).  You can verify that by multiplying it out.

Since (7x + 2) (x - 1) = 0, if either factor is 0 then the equation would be equal to 0, thus we get x = 1, -2/7

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3 years ago
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How Do I solve this I am quite confused
Kazeer [188]

Answer:

$11,714

Step-by-step explanation:

C(x) = 0.7x² - 462x + 87,944

this is a quadratic equation that opens up

the vertex will be the minimum

From the quadratic formula the x coordinate of the vertex is

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x = 330

Plug in

c(330) = 0.7(330²) - 462(330) + 87,944

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$11,714

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3 years ago
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How do you solve tangets?
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3 years ago
A line has a slope of 7 and passes through the point (-2,-1) What is its equation in point-slope form?
elena-s [515]

Answer:

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Step-by-step explanation:

Point slope form:

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So the answer is;

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