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
REY [17]
3 years ago
15

X-y=-10 2x+4y=22 Solving Systems by Substitution

Mathematics
1 answer:
IRINA_888 [86]3 years ago
8 0

Answer:

 [1]    x - y = -10

  [2]    2x + 4y = 22

Step-by-step explanation:

// Solve equation [1] for the variable  x  

 

 [1]    x = y - 10

// Plug this in for variable  x  in equation [2]

  [2]    2•(y -10) + 4y = 22

  [2]    6y = 42

// Solve equation [2] for the variable  y  

  [2]    6y = 42  

  [2]    y = 7  

// By now we know this much :

   x = y-10

   y = 7

// Use the  y  value to solve for  x  

   x = (7)-10 = -3

I am sorry if I got it wrong but I hope this helped.

MARK ME BRAINLEST.

You might be interested in
I mark brainlest for anybody who answer's tis question ;-;
Zepler [3.9K]

Answer:

b~ 32

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
A tank contains 300 liters of fluid in which 40 grams of salt is dissolved. Brine containing 1 gram of salt per liter is then pu
bonufazy [111]

Answer:

A(t) = 300 -260e^(-t/50)

Step-by-step explanation:

The rate of change of A(t) is ...

A'(t) = 6 -6/300·A(t)

Rewriting, we have ...

A'(t) +(1/50)A(t) = 6

This has solution ...

A(t) = p + qe^-(t/50)

We need to find the values of p and q. Using the differential equation, we ahve ...

A'(t) = -q/50e^-(t/50) = 6 - (p +qe^-(t/50))/50

0 = 6 -p/50

p = 300

From the initial condition, ...

A(0) = 300 +q = 40

q = -260

So, the complete solution is ...

A(t) = 300 -260e^(-t/50)

___

The salt in the tank increases in exponentially decaying fashion from 40 grams to 300 grams with a time constant of 50 minutes.

6 0
3 years ago
Read 2 more answers
If 75 percent of the employees of a certain company take a winter vacation, 40 percent take a winter and a summer vacation, and
anyanavicka [17]

Answer: 5%

Step-by-step explanation:

The number of employees that took Winter vacation = 75%

The number of employees that took Both winter and summer vacation = 40%

The number that took Neither = 20

The total number of employees (%) =Winter + Summer - Both + Neither = 100%

75%+ Summer - 40%+ 20%= 100%

Solving for Summer = 45%

Now we are interested in the employees that took summer but not winter = Summer only = Summer - Both(i.e. summer overlap with winter) = 45%-40%= 5%

5 0
3 years ago
If shepherd A gives 8 sheep to sheepherd B , they will have the same amount of sheep. On the other hand , if shepherd B gives 8
Lelechka [254]

Answer:

pues tiene la misma cantidad que es 8

7 0
3 years ago
Can someone please help me out
Serga [27]

cylinder but which grade is this?

7 0
3 years ago
Other questions:
  • Got stuck can someone help me
    15·1 answer
  • How much 0.144 divide 0.96
    10·2 answers
  • Multiply c^2(c^2-10c+25)
    9·1 answer
  • Is it a zero slope when the zero is the numerator of a fraction?? Ex:0/29
    8·1 answer
  • Please help I don’t understand what im supposed to do. My teacher said I have to put the whole number as a numerator and a 1 as
    7·2 answers
  • At work, Brett must check and record the internal temperature of the freezer on an hourly basis. When working properly, the temp
    12·1 answer
  • Hi, I don't need this really fast, but I really don't understand how to do surface area and lateral surface area with rectangula
    13·2 answers
  • Having just turned 16 years old, your friend has their mind set on buying a new car by the time they turn 20 years old. They can
    7·1 answer
  • tom drives 200 miles in 4 hour. he drives the first 32 miles at an average speed of 64mph. work out his average sped for the res
    11·1 answer
  • I need help lolsssss
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!