What is the orgins of a line if the slope is -2

You are buying a new television and see it at the same price in several shops with various discounts.

Mariulka [41]

This is because of there different marketing statargies plus the reason behind this can be because they have high stock left and they want to clear that

8 0

3 years ago

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A self-serve car wash charges $5.55 to use its facilities, plus an additional $0.67 for each minute the customer is at the self-

MA_775_DIABLO [31]

Answer:

10.91

Step-by-step explanation:

.67×8=5.36+5.55=10.91

6 0

2 years ago

Suppose z varies directly with x and inversely with the square of y. If z = 18 when I = 6 and y = 2, what is z when I 7 and y =

madam [21]

It is given that z varies directly with x and inversely with the square of y so it follows:

$z=k\frac{x}{y^2}$

It is also given that z=18 when x=6 and y=2 so it follows:

$\begin{gathered} 18=k\frac{6}{2^2} \\ k=\frac{18\times4}{6} \\ k=12 \end{gathered}$

So the equation of variation becomes:

$z=12\frac{x}{y^2}$

Therefore the value of z when x=7 and y=7 is given by:

$\begin{gathered} z=\frac{12\times7}{7^2} \\ z=\frac{12}{7} \\ z\approx1.7143 \end{gathered}$

Hence the value of z is 12/7 or 1.7143.

6 0

1 year ago

Please help in maths all answers.....2i/3-6i

pishuonlain [190]

Answer: 45 degrees I think

Step-by-step explanation:

5 0

3 years ago

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Rationalize the denominator.

Maslowich

If you're using the app, try seeing this answer through your browser: brainly.com/question/3166412

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$\mathsf{\dfrac{\sqrt{a}+2\sqrt{y}}{\sqrt{a}-2\sqrt{y}}}$

Multiply and divide by the conjugate of the denominator, which is $\mathsf{\sqrt{a}+2\sqrt{y}:}$

$\mathsf{=\dfrac{\big(\sqrt{a}+2\sqrt{y}\big)\cdot \big(\sqrt{a}+2\sqrt{y}\big)}{\big(\sqrt{a}-2\sqrt{y}\big)\cdot \big(\sqrt{a}+2\sqrt{y}\big)}}\\\\\\ \mathsf{=\dfrac{\big(\sqrt{a}+2\sqrt{y}\big)^2}{\big(\sqrt{a}-2\sqrt{y}\big)\cdot \big(\sqrt{a}+2\sqrt{y}\big)}}$

The numerator is a square of a sum, and the denominator is the product of a difference and a sum (product of two conjugates). Then, expand the common products:

$\mathsf{=\dfrac{\big(\sqrt{a}\big)^2+2\cdot \sqrt{a}\cdot 2\sqrt{y}+\big(2\sqrt{y}\big)^2}{\big(\sqrt{a}\big)^2-\big(2\sqrt{y}\big)^2}}\\\\\\ \mathsf{=\dfrac{a+4\cdot \sqrt{a}\cdot \sqrt{y}+2^2\cdot \big(\sqrt{y}\big)^2}{a-2^2\cdot \big(\sqrt{y}\big)^2}}$

$\mathsf{=\dfrac{a+4\sqrt{ay}+4y}{a-4y}}\quad\longleftarrow\quad\textsf{this is the answer.}$

I hope this helps. =)

8 0

3 years ago