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
4vir4ik [10]
3 years ago
5

Solve the simultaneous equations -x + 5y = -7 x + y = – 5 x = 1 y= 0

Mathematics
2 answers:
vodomira [7]3 years ago
5 0

y= -5-x

-x + 5(-5-x) = -7

-x -25-5x =-7

-x-5x = 25 -7

-6x= 18

x = -3

-3 +y = -5

y= -5 +3

=-2

-(-3) + 5(-2)

3 - 10 = -7

olga_2 [115]3 years ago
4 0

Answer:

y= -2, x= -3

Step-by-step explanation:

Firstly, substitute the x and y values:

-x + 5(0)= -7

x+ 0 = -5

second thing to check: DSA - different signs addition (positive x and -x)

-x+5y=-7 take away x+y=-5

6y= -12

y= -2

To find x: -x + 5(-2)= -7

-x= -7 + 10

x= -3

You might be interested in
Solve for x.<br>8 + 6x<br>4*+2​
zheka24 [161]

Answer:

x = 0

Step-by-step explanation:

8 + 6x = 4 * 2

If this is the equation then start with multiplying 4 by two and subtracting 8 from both sides

6x = 0

Divide 6 from both sides

x = 0

To test this, insert the value of x which is 0

8 + 6(0) = 4 * 2

Multiply 6 and 0

8 + 0 = 4 * 2

Multiply 4 and 2

8 + 0 = 8

Add

8 = 8

This equation is true as you can see so x is equal to 0.

Hope this helps.

- Que

5 0
4 years ago
Read 2 more answers
Find two positive numbers satisfying the given requirements. the product is 192 and the sum of the first plus three times the se
Zepler [3.9K]
<h3>Given</h3>

Two positive numbers x and y such that xy = 192

<h3>Find</h3>

The values that minimize x + 3y

<h3>Solution</h3>

y = 192/x . . . . . solve for y

f(x) = x + 3y

f(x) = x + 3(192/x) . . . . . the function we want to minimize

We can find the x that minimizes of f(x) by setting the derivative of f(x) to zero.

... f'(x) = 1 - 576/x² = 0

... 576 = x² . . . . . . . . . . . . multiply by x², add 576

... √576 = x = 24 . . . . . . . take the square root

... y = 192/24 = 8 . . . . . . . find the value of y using the above equation for y

The first number is 24.

The second number is 8.

6 0
4 years ago
Plssss help me with this asap D:
Eddi Din [679]

Answer:

A

D

Step-by-step explanation:

because first street intersect 2 and 3

...

and second street is parallel to third street

7 0
3 years ago
Read 2 more answers
Is x^(-2)+5 a polynomial expression? Why or why not?
SIZIF [17.4K]
Thanks for the correction. Answer: No, x^(^-^2^)+5 is a polynomial expression because it has a break between numerical exponents. It goes from 0x^1 to x^2, which makes it in the form of x^{2} to x^0 which means that it is NOT a polynomial.
3 0
4 years ago
Read 2 more answers
5250 marked down 15%
dimulka [17.4K]

Answer:

r

Step-by-step explanation:

r

6 0
3 years ago
Other questions:
  • Kylie jarred 12 liters of jam after 2 days. How many days does Kylie need to spend making
    6·1 answer
  • How do I solve this ???
    6·1 answer
  • Company Price per Share Earnings per Share
    14·1 answer
  • There were 1100apples at a fruit stall. There were 220 more apples than mangoes.
    13·2 answers
  • select an appropriate unit from the choices below and convert that rate to that unit. I only need 24 and 26 please help!
    11·1 answer
  • 5. Determine the formula for the following arithmetic sequence: 4, 7, 10, 13, ...
    5·1 answer
  • Can someone help its timed
    6·2 answers
  • X + 2y = 6<br> (3x + 8y = 4
    13·1 answer
  • Which ones are like terms?<br> -1 and 4<br> 3x and -6<br> 5x and -1<br> 5x and 4
    11·1 answer
  • Help me solve this problem please
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!