3 years ago

Can I please get some real help on this question?

Mathematics

1 answer:

nlexa [21]3 years ago

5 0

Yeas ofcourse just sign up form brainly premium

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Find the value of y A)6/3 B)6 C)2/3 D)4

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Answer:

y = A ( $6\sqrt{3}$ )

Step-by-step explanation:

$x^{2} +y^{2} = 12^{2}=144\\y^{2}-9^{2}=x^{2} -3^{2} \\x^{2} -y^{2}=-72\\2y^{2}=216\\y^{2}=108\\ y=\sqrt{108}=6\sqrt{3}$

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3 years ago

Evaluate m+n for m = 9 and n=7

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Answer:

Step-by-step explanation:

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Subtract. –84 – 55 a. –29 b. –139 c. 29 d. 139

Hitman42 [59]

-84 - 55 = -139 Here both have same sign (-) so u add and put the common sign(-) .... So the answer is option B ( -139)... Hope it helps!!!

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3 years ago

<img src="https://tex.z-dn.net/?f=15%20x%5E%7B2%7D%20%2B14x-49%3D0" id="TexFormula1" title="15 x^{2} +14x-49=0" alt="15 x^{2} +1

Alex777 [14]

$15x^2+14x-49=0\\\\
Terms:\\
a=15\ \ \ \ b=14\ \ \ \ c=-49\\
Quadratic\ Formula:\\\\
x=\dfrac{-b\pm\sqrt{b^2-4ac}}{2a}\\\\
x=\dfrac{-14\pm\sqrt{196+2,940}}{30}\\\\
x=\dfrac{-14\pm\sqrt{3,136}}{30}\\\\
x=\dfrac{-14\pm56}{30}$

$Roots:\\\\
x'=\dfrac{-14+56}{30}\\\\
x'=\dfrac{42}{30}\\\\
x'=\dfrac{21}{15}\\\\
\boxed{x'=\dfrac{7}{5}}\\\\\\\\
x''=\dfrac{-14-56}{30}\\\\
x''=\dfrac{-70}{30}\\\\
\boxed{x''=\dfrac{-7}{3}}$

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3 years ago

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wlad13 [49]

Answer:

your answer would be .

Step-by-step explanation:

8750

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3 years ago