2 years ago

Pls help I will give you 15 points

Mathematics

1 answer:

STALIN [3.7K]2 years ago

8 0

Answer:

Ana still needs to read 1/5 of th journal

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The perimeter of a rectangle is 40 units. One side of the rectangle is 7 and the other is x+2. What's the value of x?

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Brayden is making soup. To make the broth, he combines 23cup of vegetable stock and 25cup of chicken stock. Boiling the broth ca

xxTIMURxx [149]

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Step-by-step explanation:

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How to solve 5-2x=-4x-7

stepan [7]

Answer:

x=-6

Step-by-step explanation:

Use Substitution

so 5-2x=-4x-7

I'ma move that -4x to the other side by making it a positive

5+2x=-7

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STatiana [176]

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2 years ago

Factor the following trinomial. (Hint: Solve the equations first.)<br><br> x²-2x-2

Alex_Xolod [135]

Answer:

$(x-(1+\sqrt{3}))(x-(1-\sqrt{3}))$

Step-by-step explanation:

we know that

The formula to solve a quadratic equation of the form

$ax^{2} +bx+c=0$

is equal to

$x=\frac{-b(+/-)\sqrt{b^{2}-4ac}} {2a}$

in this problem we have

$x^{2} -2x-2=0$

$a=1\\b=-2\\c=-2$

substitute in the formula

$x=\frac{-(-2)(+/-)\sqrt{-2^{2}-4(1)(-2)}} {2(1)}$

$x=\frac{2(+/-)\sqrt{12}} {2}$

$x=\frac{2(+/-)2\sqrt{3}} {2}$

$x_1=\frac{2(+)2\sqrt{3}} {2}=1+\sqrt{3}$

$x_2=\frac{2(-)2\sqrt{3}} {2}=1-\sqrt{3}$

therefore

$x^{2} -2x-2=(x-(1+\sqrt{3}))(x-(1-\sqrt{3}))$

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2 years ago