1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Xelga [282]
2 years ago
7

Solve the following equation simultaneously 1/x-5/y=7, 2/x+1/y=3​

Mathematics
1 answer:
maria [59]2 years ago
6 0

Answer:

  (x, y) = (1/2, -1)

Step-by-step explanation:

Subtracting twice the first equation from the second gives ...

  (2/x +1/y) -2(1/x -5/y) = (3) -2(7)

  11/y = -11 . . . . simplify

  y = -1 . . . . . . . multiply by y/-11

Using the second equation, we can find x:

  2/x +1/-1 = 3

  2/x = 4 . . . . . . . add 1

  x = 1/2 . . . . . . . multiply by x/4

The solution is (x, y) = (1/2, -1).

_____

<em>Additional comment</em>

If you clear fractions by multiplying each equation by xy, the problem becomes one of solving simultaneous 2nd-degree equations. It is much easier to consider this a system of linear equations, where the variable is 1/x or 1/y. Solving for the values of those gives you the values of x and y.

A graph of the original equations gives you an extraneous solution of (x, y) = (0, 0) along with the real solution (x, y) = (0.5, -1).

You might be interested in
Arithmetic sequence for 8 11 14 17 expression
Readme [11.4K]
A(n)=3n+5

You add 3 to each number so it’s the rate
5 is the initial value. 8-3=5
3 0
3 years ago
An experienced landscaper thought it would be funny to play a joke on some rookie landscapers. The rookies were given the measur
pashok25 [27]

Answer:

48∛9 ft²

Step-by-step explanation:

The length (L) and width (W) are given by:

L = 4\sqrt[3]{24}\\ W= 6\sqrt[3]{3}

Since this is a rectangular region, the area is given by:

A=L*W=L \\A=4\sqrt[3]{24}* 6\sqrt[3]{3}\\A=24\sqrt[3]{72}\ ft^2

The answer can be further simplified by factoring as follows:

A=24\sqrt[3]{72} = \\A=24\sqrt[3]{2*2*2*3*3}= 24\sqrt[3]{2^3*9}\\A=48\sqrt[3]{9}\ ft^2

The exact area is its simplest form is 48∛9 ft²

6 0
3 years ago
21 quarters out of 186 quarters simplest form
posledela
21/186
Answer: 7/62
Hope this helps!!!!!!!

4 0
3 years ago
Read 2 more answers
The sides of an isosceles triangle are 8, 8, and 3. The measure of the vertex angle to the nearest degree is _____°. 44 17 31 22
Doss [256]
We may draw a vertical that bisects the vertex angle and the shorter side of the triangle, to form a right-triangle with the measurements:
hypotenuse = 8
length = 1.5

We may then apply:
sin(∅) = P / H
sin(∅) = 1.5 / 8
∅ = 10.8 ≈ 11°

This is half of the vertex angle, so the vertex angle is:
11 * 2 = 22°
4 0
3 years ago
Read 2 more answers
Jada solved the equation Negative StartFraction 4 over 9 EndFraction = StartFraction x over 108 EndFraction for x using the step
Lilit [14]

Answer: First option.

Step-by-step explanation:

The complete exercise is attached.

In order to solve this exercise, it is necessary to remember the following property:

The Multiplication property of Equality states that:

If\ a=b\ then\ a*c=b*c

In this case, the equation that Jada had is the folllowing:

-\frac{4}{9}=\frac{x}{108}

Jada needed to solve for the variable "x" in order to find its value.

The correct procedure to solve for for "x" is to multiply both sides of the equation by 108. Then, you get:

(108)(-\frac{4}{9})=(\frac{x}{108})(108)\\\\-48=x

As you can notice in the picture, Jada did not multiply both sides of the equation by 108, but multiplied the left side by -\frac{4}{9}<em>  </em>and the right side by -\frac{9}{4}.

Therefore,you can conclude that Jada should have multiplied both sides of the equation by 108.

3 0
3 years ago
Read 2 more answers
Other questions:
  • 2x-3yi=14+12i how do I find x and y
    10·2 answers
  • 20. f(x) = -9x - 2 for x = 7
    13·1 answer
  • A trapezoid has bases that measure 9 cm and 5 cm. The height of the figure is 4 cm . What is the area of the trapezoid ?
    10·2 answers
  • What is the domain and range of y=-2/3x+6? Please help :c Thank you kind hooman
    7·1 answer
  • Simplify 27^(-2/3) x 25^(1/2) x 5^0 9 5 9/5 5/9
    12·1 answer
  • Convert 290 degrees to radians
    5·1 answer
  • Which expressions are equivalent to -9x-21
    10·1 answer
  • If AB = 12, and BD = 18 what is the value of BC?
    13·1 answer
  • I'd appreciate it if anyone could help out as soon as possible!
    13·1 answer
  • Isaiah spent $19.60 on a gift for his mother. The amount that he spent on the gift was StartFraction 5 over 7 EndFraction of the
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!