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nataly862011 [7]
3 years ago
15

7 times a number is 18 less than the square of that number. Find the positive solution.

Mathematics
1 answer:
Arte-miy333 [17]3 years ago
7 0
So 7 x = x2 -18 so you get the quadratic x^2 -7x -18 and then get 2 x -9= -18 and 2 + -9 = -7 so you get (x + 2) ( x - 9) so the positive solution would be x-9 = 0 so x= 9. Hope this helps :)
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Inga [223]

Answer:

A = 3

B = -5

C = 2

Step-by-step explanation:

The way to format a quadratic equation is: ax^2 + bx + c, so the first step to solving this is to format it in the right way, where the x^2 comes first, the x second, and the number alone.

After formatting, your equation should look like this: 3x^2 - 5x + 2

From here, you can see the the <em>a </em> is 3, the <em>b</em> is -5, and the <em>c </em>is 2

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3 years ago
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BigorU [14]

Answer:

$936

Step-by-step explanation:

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7 0
3 years ago
Mr.Williams physical education class lasts 7/8 hour if instruciton is 1/5 how many minutes are not spent on instruction?
g100num [7]
= 7/8 − 1/5

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= (35 - 8) / 40

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Hope I was able to help! :)
6 0
3 years ago
Read 2 more answers
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Verdich [7]

Answer:

181 feets

Step-by-step explanation:

Given that:

Rate of change in water level = - 1.5 feets per month

Water level at beginning of May = 187 feets above sea level

Water level at the end of 4 months =?

Total change after four months = rate of change per month * number of months

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Hence water level after 4 months :

187 feets + (-6 feets)

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= 181 feets

8 0
3 years ago
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