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
Bad White [126]
3 years ago
12

12x+15y=34 -6x+5y=3

Mathematics
1 answer:
Y_Kistochka [10]3 years ago
6 0

Answer:

x = 5/6 , y = 8/5

Step-by-step explanation:

Solve the following system:

{12 x + 15 y = 34 | (equation 1)

{5 y - 6 x = 3 | (equation 2)

Add 1/2 × (equation 1) to equation 2:

{12 x + 15 y = 34 | (equation 1)

{0 x+(25 y)/2 = 20 | (equation 2)

Multiply equation 2 by 2/5:

{12 x + 15 y = 34 | (equation 1)

{0 x+5 y = 8 | (equation 2)

Divide equation 2 by 5:

{12 x + 15 y = 34 | (equation 1)

{0 x+y = 8/5 | (equation 2)

Subtract 15 × (equation 2) from equation 1:

{12 x+0 y = 10 | (equation 1)

{0 x+y = 8/5 | (equation 2)

Divide equation 1 by 12:

{x+0 y = 5/6 | (equation 1)

{0 x+y = 8/5 | (equation 2)

Collect results:

Answer:  {x = 5/6 , y = 8/5

You might be interested in
Partial quotients for 145/5
Rudik [331]
145/5 is 29. Is this good?
3 0
3 years ago
2<br>If A=<br>4 3<br>find A1 using<br>elementary row operations.​
MA_775_DIABLO [31]

Answer:   A^{-1}=\left[\begin{array}{cc}\frac{3}{2}&-\frac{1}{2}\\-2&1\end{array}\right]

<u>Step-by-step explanation:</u>

                  \left[\begin{array}{cc}2&1\\4&3\end{array}\right]=\left[\begin{array}{cc}1&0\\0&1\end{array}\right]

\dfrac{1}{2}Row\ 1\rightarrow\left[\begin{array}{cc}1&\frac{1}{2}\\4&3\end{array}\right]=\left[\begin{array}{cc}\frac{1}{2}&0\\0&1\end{array}\right]

Row\ 2 -4 \ Row\ 1\rightarrow \left[\begin{array}{cc}1&\frac{1}{2}\\0&1\end{array}\right]=\left[\begin{array}{cc}\frac{1}{2}&0\\-2&1\end{array}\right]

Row\ 1-\dfrac{1}{2}\ Row\ 2 \rightarrow \left[\begin{array}{cc}1&0\\0&1\end{array}\right]=\left[\begin{array}{cc}\frac{3}{2}&-\frac{1}{2}\\-2&1\end{array}\right]

5 0
4 years ago
ALGEBRA QUESTION<br> x+7=8.3;x=1.3 TRUE OR FALSE
Leni [432]
This is true.

x+7=8.3. Remove 7 on both sides :x=8.3-7=1.3
7 0
3 years ago
Read 2 more answers
The product of a number and -8 gives eight times the sum of that number and 36. Find that number
Viefleur [7K]

Answer:

-18

Step-by-step explanation:

Let x be our number. First we have to write our equation.

The product of a number and -8 is represented as -8x (-8 multiplied by x). Remember that 'product' signifies multiplication.

The result is eight times the sum of x and 36. This is represented as 8(x + 36). We add x and 36 first because 8 has been multiplied by the sum of those two numbers.

So our equation is:

-8x = 8(x + 36)

We can now solve for x. First, expand the bracket.

-8x = 8x + 288

Next, subtract 8x from both sides. This will give us only one term containing x, which will make it easier to solve.

-8x - 8x = 8x + 288 - 8x

-16x = 288

Divide both sides by -16

x = -18

3 0
3 years ago
Write an= 8 + (n-1)(3) as a function
Citrus2011 [14]

Answer:

The answer to your question is 3n+5

5 0
3 years ago
Other questions:
  • Find the numerical value of cosh (ln5)
    10·1 answer
  • HELP!
    6·1 answer
  • Your name is included in a list of 6 names. One name is selected at random. Write the probability, as a decimal, that it is your
    11·1 answer
  • The mean cost of a meal for two in a mid-range restaurant in Tokyo is $40 (Numbeo.com website, December 14, 2014). How do prices
    12·1 answer
  • Graph four points that satisfy the equation y=-x-2
    12·2 answers
  • Allyson loves to eat cheese sticks. A small order comes with 3 cheese sticks, and a large order comes with 6 cheese sticks. Last
    7·2 answers
  • Pan make $500 each week. She puts 20% of her weekly paycheck in savings. How many does she put in savings each week
    5·1 answer
  • Write a quadratic function given the roots (3,0) and (-1,0) and the point (-3,3)?
    7·1 answer
  • Calculate the number of seconds in a day in standard form​
    14·1 answer
  • Which of the following has factor of (× - 4) (× - 3)?​
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!