2 years ago

Please help asap !! It’s for a exam and it’s due really soon .

Mathematics

2 answers:

Brilliant_brown [7]2 years ago

4 0

The person above is correct I believe

harina [27]2 years ago

3 0

-6(3x + 1) I’m sure this is it

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Solve for x.

Ivahew [28]

ANSWER

$x=\frac{2-\sqrt{10}} {3}$

or

$x=\frac{\sqrt{10}+2} {3}$

We have

$3x^2-4x-2=0$

Since we cannot factor easily, we complete the square.

Adding 2 to both sides give,

$3x^2-4x=2$

Dividing through by 3 gives

$x^2-\frac{4}{3}x= \frac{2}{3}$

Adding $(-\frac{2}{3})^2$ to both sides gives

$x^2-\frac{4}{3}x+(-\frac{2}{3})^2= \frac{2}{3}+(-\frac{2}{3})^2$

The expression on the Left Hand side is a perfect square.

$(x-\frac{2}{3})^2= \frac{2}{3}+\frac{4}{9}$

$\Rightarrow (x-\frac{2}{3})^2= \frac{10}{9}$

$\Rightarrow (x-\frac{2}{3})=\pm \sqrt{\frac{10}{9}}$

$\Rightarrow (x)=\frac{2}{3} \pm {\frac{\sqrt{10}}{3}$

Splitting the plus or minus sign gives

$x=\frac{2- \sqrt{10}} {3}$

or

$x=\frac{\sqrt{10}+2} {3}$

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2 years ago

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At a sporting good store the price of a basketball at $650 during a sale this prices marked down 45% what is the sale price of a

Ne4ueva [31]

The multiplier for decreasing by 45% is 0.55
So you times the multiplier by the price to get your answer:

650 x 0.55 = $357.50

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Can the division expression 4 divided by 15 be shown as a fraction?

oksian1 [2.3K]

Yes, it can be shown as 4/15.

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If a/b and x/y represent rational expressions and b0 and y0, what is true of their product? Select three options.

MAXImum [283]

Answer:

It’s the 2nd,3rd,and 4th

Step-by-step explanation:

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aliya0001 [1]

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$^{n}C_r$ or $\left(\begin{array}{cc}n\\r\end{array}\right)$

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$^{n}C_r = \frac{n!}{r!(n - r)!}$

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