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4 years ago

Solve for x and y 9/x-4/y=8

1 answer:

7 0

You can solve <span>9/x-4/y=8 for x or for y but NOT at the same time.

Solving for x: </span><span>9/x-4/y=8 Mult all 3 terms by xy to eliminate the fractions.

9(xy)/x - 4xy/y = 8xy => 9y - 4x = 8xy, or 9y = 4x + 8xy = 4x(1+2y)

then 9y = x [ 4(1+2y) ]
9y
therefore x = ------------
4(1+2y)

Solve for y using a similar approach.

</span>

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The absolute value of a number is 16.what is this number?select all that apply

serious [3.7K]

Answer:

A and E

Step-by-step explanation:

| 16 | = 16

|-16| = 16

3 0

3 years ago

Which is the correct calculation of the y-coordinate of point A? 0 (0 - 0)2 + (1 - y2 = 2 O (0 - 1)² + (0- y2 = 22 (0-0)² + (1 -

dimaraw [331]

Answer:

The y-coordinate of point A is $\sqrt{3}$ .

Step-by-step explanation:

The equation of the circle is represented by the following expression:

$(x-h)^{2}+(y-k)^{2} = r^{2}$ (1)

Where:

$x$ - Independent variable.

$y$ - Dependent variable.

$h$ , $k$ - Coordinates of the center of the circle.

$r$ - Radius of the circle.

If we know that $h = 0$ , $k = 0$ and $r = 2$ , then the equation of the circle is:

$x^{2} + y^{2} = 4$ (1b)

Then, we clear $y$ within (1b):

$y^{2} = 4 - x^{2}$

$y = \pm \sqrt{4-x^{2}}$ (2)

If we know that $x = 1$ , then the y-coordinate of point A is:

$y = \sqrt{4-1^{2}}$

$y = \sqrt{3}$

The y-coordinate of point A is $\sqrt{3}$ .

4 0

3 years ago

In the year 2006, a person bought a new car for $13500. For each consecutive year after that, the value of the car depreciated b

gogolik [260]

Answer:

9855

Step-by-step explanation:

5 0

3 years ago

What is the sqaure root of (x-3/7) divided by 12x+7 divided by 76.3x?

natulia [17]

Answer:

$\sqrt{\frac{3x}{3} } + \frac{10}{109} x$

Step by step:

$\sqrt{x-\frac{3}{7}$ = $\sqrt{\frac{49x-21}{7} }$

$\sqrt{\frac{49x-21}{7} }$ ÷ 12x+7= $\sqrt{\frac{7x-3x}{12}} + 7$

$\sqrt{\frac{7x-3x}{12}} + 7$ ÷ 76.3x = $\sqrt{\frac{3x}{3} } + \frac{10}{109} x$

Hope this helps!

8 0

4 years ago

Ms. Pacheco, Mr Edwards, and Mr Richards are three math teachers at turner middle school. Ms. Pacheco is three years older than

zubka84 [21]

Mr edwards = Mr r x 2
Mr r = Mr p - 3 = Mr e ÷ 2. Mr p = 30
Mr e + Mr r = 81. Mr e = 54
Mr p = Mr r + 3. Mr r = 27

Mr Edwards = 2(Mr p - 3)
Mr e = 2(mr p) - 6

Mr r = [2(Mr p) -6] ÷ 2
Mr r = [2( Mr r + 3) - 6] ÷ 2

2(Mr r) + (Mr p - 3) = 81
2(Mr p -3) + (Mr p - 3) = 81
3(Mr p - 3) = 81
3(Mr p) - 9 = 81. Hope this helps!!!
3(Mr p) + 9 = 81 + 9
3(Mr p) = 90
Mr p = 90 ÷ 3
Mr p = 30

5 0

3 years ago

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