3 years ago

What's 9 + 10 plz answer quickly

Mathematics

2 answers:

xxMikexx [17]3 years ago

8 0

9 + 10 = 19
Add 10 to 9 then you would get 19

Romashka-Z-Leto [24]3 years ago

3 0

9+10 is 19 not 21 xD

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What multiplies to -12 but added together equals -10

Airida [17]

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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3 years ago

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7nadin3 [17]

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6 0

3 years ago

NEED HELP PLEASE IM BEGGING YOU PLEASE!!!!!!!!!!!!!

natulia [17]

Answer:

Step-by-step explanation:

hopes this helps