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noname [10]
3 years ago
12

What multiplies to -12 but added together equals -10

Mathematics
1 answer:
Airida [17]3 years ago
4 0
Let the two numbers be x and y, then,
xy = -12 . . . (1)
x + y = -10 . . . (2)
From (2), x = -10 - y . . . (3)
Putting (3) into (1), gives
(-10 - y)y = -12
-10y - y^2 = -12
y^2 + 10y - 12 = 0
y= \frac{-10\pm \sqrt{10^2-(4\times(-12))} }{2} = \frac{-10\pm \sqrt{148} }{2} = \frac{-10\pm 2\sqrt{37} }{2} = -5\pm\sqrt{37}

Therefore, the two numbers are -5+\sqrt{37} and -5-\sqrt{37}
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Hello there!

<span>Find the volume of the cone. Use 3.14 as an approximation for pi. Round the answer to two decimal places. 
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Masja [62]

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D, E.

Step-by-step explanation:

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Opt A. 123 < 6(18) = 123 < 108. Incorrect option.

Opt B. 123 < 6(19) = 123 < 114. Incorrect option.

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Opt E. 123 < 6(24) = 123 < 144. Correct option.

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