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
Leto [7]
3 years ago
12

Find the solution to the system of equations, x + 3y = 7 and 2x + 4y = 8.

Mathematics
2 answers:
kobusy [5.1K]3 years ago
8 0

Answer: Hello there!

here we have two equations:

1) x + 3y = 7

2) 2x + 4y = 8

a) first we want to isolate x in the first equation:

x + 3y = 7

x = 7 -3y

done!

b) now we want to replace it in the second equation, and in this way get a equation that depends only on the variable y.

2x + 4y = 8

2(7 - 3y) + 4y = 8

c) now we sole this equation and obtain the value of y.

14 - 6y + 4y = 8

14 - 2y = 8

-2y = 8 - 14 = -6

y = 6/2 = 3

d) now we have the value of y, and we can substitute it on the equation that we got in the part a)

x = 7 - 3y

x = 7 - 3*3 = 7 - 9 = -2

e) now we knowt that x = -2 and y = 3, then the pair (x,y) can be written as:

(-2,3).

Tems11 [23]3 years ago
7 0

Answer:

-2,3

Step-by-step explanation:

You might be interested in
Stephanie surveyed the students in her class to find out their favorite color. her results are in the table. what percent of Ste
wariber [46]
Hi there!

To solve this problem, we need to find the amount of classmates out of the entire class who did not choose blue as their favorite color and then convert it into a percentage. 

First, let's find the fraction:

Since there are 25 total people in her class, since

6 + 9 + 10 = 25

25 is the denominator of the fraction;

Since there are 16 people who did not choose blue,

6 + 10 = 16

16 is the numerator of the fraction. 

So, our fraction is 16/25. 

Now, we need to convert it into a percentage. To do this, we need to make the denominator 100 by multiplying it by a certain number, and then multiplying the numerator by that same number so the fraction stays equal:

16/25 
= 16*4/25*4
= 64/100
= 64%

So, the answer is 64% of Stephanie's classmates.

Hope this helps!
3 0
3 years ago
I need help pleaseeeeeeee
Greeley [361]

Answer:

1) additive identity

2) associative property of multiplication

3) commutative property of addition

4) multiplicative identity

5) associative property of addition

6) commutative property of multiplication

Step-by-step explanation:

5 0
3 years ago
Add. Write your answer as a mixed number in simplest form.
eimsori [14]

Answer: 91747 is what i got hope this helped

Step-by-step explanation:

4 0
3 years ago
When you divide 4 by 7 the quotient is a
horrorfan [7]

Answer:

I believe the answer is 0.571428571428571

Step-by-step explanation:


7 0
3 years ago
Read 2 more answers
Solve the equation 3(x-4)=2(x+6)
Daniel [21]

Answer:

x=24

Step-by-step explanation:

When distributing using the distributive property, you get 3x- 12=2x+12. To solve for x, you need to isolate it. If you subtract 2x from both sides, you get x-12=12! All that’s left to do is add 12 to both sides, which gives you x=24.

5 0
3 years ago
Other questions:
  • Solving equations to find angle measure<br><br> Show work please
    13·1 answer
  • What is 15/6 in mixed number
    7·2 answers
  • Kurt drew a rectangular maze with a length of 3/4 foot and a width of 5/12 foot. What is the area, in square feet, of Kurt's maz
    13·1 answer
  • Which of the following is an example of a chemical change?
    12·2 answers
  • The price-earnings (PE) ratios of a sample of stocks have a mean value of 10.5 and a standard deviation of 3. If the PE ratios h
    14·1 answer
  • Show your work<br> 2) Is(-3,-7) a solution to<br> 4x – 8y &lt; 24<br> Show your work
    10·1 answer
  • What is?<br><br> 8(x+3) - 2x + 18
    7·1 answer
  • Describe how to compare the two decimals 0.6 and 0.8
    8·1 answer
  • Using the slope formula, find the slope of the line through the given points.<br> (6,4) and (1,9)
    13·1 answer
  • Standard form of 1.23 * 10 to the 11th power <br>​
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!