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
Katen [24]
2 years ago
11

X=2y-47x+5y=-66 what is the x- value​

Mathematics
1 answer:
Gwar [14]2 years ago
5 0

Answer:

x = -8

Step-by-step explanation:

x = 2y - 4 --- Equation 1

7x + 5y = -66 --- Equation 2

I will be using the substitution method to solve this.

Substitute x = 2y - 4 into Equation 2:

7x + 5y = -66

7(2y - 4) + 5y = -66

Evaluate.

14y - 28 + 5y = -66

Evaluate like terms.

19y - 28 = -66

Isolate 19y.

19y = -66 + 28

     = -38

Find y.

y = -38 ÷ 19

y = -2 --- Equation 3

Substitute y = -2 into Equation 1:

x = 2y - 4

x = 2(-2) - 4

Evaluate.

x = -4 - 4

x = -8

You might be interested in
After college you start a job earning $40000 a year. You get a 6% raise each year. a) How much will you earn in year 2?
Elodia [21]
The answer to Part a is $44,800. I did this by 40000*2*3/50 which comes out to 4,800 you add that to your beginning worth, 40,000. Part b is as follows; 9,600 which comes out to be $49,600. Replace the 2 in the original equation to be 40,000*4*3/50. The number '2' and '4' represent the years, and the 3/50 is equal to 6%. 6% in math terms is 3/50. The answer to part c is as follows; 40000*10*3/50 which comes out to be 24,000 so your final answer for part c is: $64,000 I hope this helped! Let me know if you need more work shown, and I'll add more! :)

7 0
3 years ago
Mary French uses gas to heat her home. She has accumulated the following information regarding her monthly gas bill and monthly
garik1379 [7]

Answer:

Y=$24+0.09X

Step-by-step explanation:

From the question we are told that

February Heat H_1=1900\textdegree

February Gas G_1 =\$195

April Heat H_2=600\textdegree

April Gas G_2=\$78

Generally equation for heating degree-days X is mathematically given by

 X=\frac{\triangle gas\ bills}{\triangle Heating\ days}

 X=\frac{195-78}{1900-600}

 X=\$ 0.09

Generally the equation for gas bill Y is mathematically represented by

 Y=78-(600*0.09)\\Y=\$24

The equation representing the relationship between the gas bill (Y) and heating degree-days (X) is

 Y=$24+0.09X

7 0
3 years ago
Examine the expression. 17x - 34 Which is an equivalent expression? O 17*(1 + ) O 17x (1-2) O 17+(1-1) O 17*(1 + 2)​
mixer [17]

Answer:

17(x-2)

Step-by-step explanation:

Given the expression

17x - 34

We are to factorize it

Get their factors

17x = 17 * x

34 = 17 * 2

Since 17 is common to both factors, hence 17 is the GCF

17x - 34 = 17(x - 2)

Hence the equivalent expression is 17(x-2)

8 0
3 years ago
Find the unknow based length of triangle A=31.5 in 2 H=7 in then wat is Abe
Sauron [17]

Answer:

the answer is 9

Step-by-step explanation:

7 0
2 years ago
Read 2 more answers
Solve for z.<br> Z&lt;-9<br> Z&gt;-9
Alex73 [517]

Answer:

z>-9

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
Other questions:
  • How does -3-10= -13? Please explain
    5·2 answers
  • What six time twentyone
    12·1 answer
  • How much should an eleven year old boy weigh?
    10·1 answer
  • What is an equation of the line that is perpendicular to y-4=2(x-6) and passes through (-3,-5)
    15·1 answer
  • John drinks 40 ounces of water per day. How many cups of water does John drink per day?
    9·1 answer
  • The sum of two consecutive integers is -15. what is the product of the two integers? please help!!!!
    9·2 answers
  • Can you please answer the question?
    7·1 answer
  • AYOOO HELPPPPP MATHHHH......? THANKKK UUUUU
    13·1 answer
  • WILL MARK BRAINLIEST!!! PLEASE ANSWER!!! WRONG ANSWERS JUST FOR POINTS WILL BE REPORTED!!!!!!!!!!!!!! 100 POINTSSSSSSSSSSSSSSSSS
    13·2 answers
  • PLS HELP WILL MARK YOU BRAINLIEST! NO FAKE ANSWERS!<br> Find the mode of the data
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!