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3 years ago

Simplify -5 + 3d + 6 - 4d

Mathematics

1 answer:

tankabanditka [31]3 years ago

6 0

-5+3d+6-4d

anwers is 12/-30

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What are the roots of the quadratic equation below?<br> x2 + 2x= -5

muminat

Answer:

No real root.

Complex roots:

$x = -1 \pm 2i$

Step-by-step explanation:

$x^2 + 2x = -5$

$x^2 + 2x + 5 = 0$

There are no two integers whose product is 5 and whose sum is 2, so this trinomial is not factorable. We can use the quadratic formula.

$x = \dfrac{-b \pm \sqrt{b^2 - 4ac}}{2a}$

$x = \dfrac{-2 \pm \sqrt{2^2 - 4(1)(5)}}{2(1)}$

$x = \dfrac{-2 \pm \sqrt{4 - 20}}{2}$

$x = \dfrac{-2 \pm \sqrt{-16}}{2}$

Since we have a square root of a negative number, there are no real roots. If you have learned complex numbers, then we can continue.

$x = \dfrac{-2 \pm 4i}{2}$

$x = -1 \pm 2i$

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Answer:

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Step-by-step explanation:

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Given the two original statements, can a true conclusion be met? If so, what would it be? If not, why not? 1) If it is June, the

lesya692 [45]

No conclusion can be made.

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Help solve mathematics question, please. Photo.

cricket20 [7]

Hi Mark

3x+y=4

2x+y=5

Solve 3x+y=4 for y

Add -3x to both sides

3x+y-3x=4-3x

y=-3x+4

Substitute -3x+4 for y in 2x+y=5

2x+y=5

2x-3x+4=5

Simplify both sides of the equation

-x+4=5

Add -4 to both sides

-x+4-4=5-4

-x=1

Divide both sides by -1

-x/-1= 1/-1

x=-1

Substitute -1 for x in y=-3x+4

y=-3x+4

y=(-3)(-1)+4

Simplify both sides of the equation

y=7

Answer: (-1,7)

I hope that's help ! Have a great weekend :)

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3 years ago

What is the solution set for this inequality?<br><br> -8x + 40-16

Gala2k [10]

I think it’s -8x + 24

Could be wrong, but I hope it helps :)

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3 years ago