2 years ago

Is this equation linear? 1/3x-2y=7 I NEED HELP ASAP please

Mathematics

1 answer:

OleMash [197]2 years ago

8 0

In highest poer of placholder is 1 then it is linear

1/3x^1-2y^1=7
it is linear
yes it is

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Step-by-step explanation:

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The geometric mean is 12

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Find the value of X<br> PLEASE HELP ASAP!!!!!

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Answer:

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Factor this polynomial completely x2 + 3x – 18 A. (x-2)(x + 9) B. (x+3)(x-6) оо C. (x - 3)(x+6) D. (x - 3)(x-6)

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Answer:

C. $(x-3)(x+6)$

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I think the equation meant $x^2+3x-18$ ?

Anyways, to factor these kinds of quadratic, keep into consideration:

$ax^2+bx+c=(x+w)(x+v)$

ONLY if:

$w+v=b\\wv=c$

Start off by finding factors of c, which in this case, -18:

±(1, 2, 3, 6, 9, 18)

If one of the numbers is negative then the other number must be positive.

Find which two factors will sum up to b, which in this case, is 3.

$1+(-18)\neq 3\\2+(-9)\neq 3\\3+(-6)\neq 3\\6+(-3)=3\\9+(-2)\neq 3\\18+(-1)\neq 3\\$

The only two factors that work are 6 and -3.

Replace them into the factored form:

$(x+w)(x+v)\\(x+6)(x-3)\\(x-3)(x+6)$

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1 year ago

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