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
Leya [2.2K]
3 years ago
12

Which is the solution to the system 3x+y=8 and 7x−4y=25

Mathematics
1 answer:
tatyana61 [14]3 years ago
7 0

Answer:

(3, - 1 )

Step-by-step explanation:

Given the 2 equations

3x + y = 8 → (1)

7x - 4y = 25 → (2)

Multiplying (1) by 4 and adding to (2) will eliminate the y- term

12x + 4y = 32 → (3)

Add (2) and (3)  term by term to eliminate y

19x + 0 = 57

19x = 57 ( divide both sides by 19 )

x = 3

Substitute x = 3 into either of the 2 equations and solve for y

Substituting into (1)

3(3) + y = 8

9 + y = 8 ( subtract 9 from both sides )

y = - 1

solution is (3, - 1 )

You might be interested in
Mickael Saltwood can paint 138 doors in 10 hours, while Scott Kepler can paint 59 doors in 5 hours. Who can paint doors faster,
Anastaziya [24]
59x2=118 so Mickael is faster
3 0
3 years ago
Question 5 (4 points)<br> Fill in the missing numbers in these equations <br><br> PLEASE HELP ASAP
Finger [1]

Answer:

nope i need more points lol

Step-by-step explanation:

7 0
3 years ago
What is rational number and arithmetic number​
Oduvanchick [21]

\huge \mathtt \blue{answer}

Here, “p” is a numerator and “q” is a denominator. The examples of rational numbers are 6/5, 10/7, and so on. The rational number is represented using the letter “Q”. Like real numbers, the arithmetic operations, such as addition, subtraction, multiplication, and division are applicable to the rational numbers.

5 0
3 years ago
Darla decides to buy books and magazines with her money. Books cost $16 each and magazines cost $8 each. Write a function that s
Veronika [31]

Answer:

m=16x+8y

Step-by-step explanation:

let the amount of money she spend be 'm'

m=16x+8y

7 0
2 years ago
Read 2 more answers
WILL MARK BRAINLY! The population of a particular city is given by the function P(t) = 82,100(1.02), where t is the time in year
Tcecarenko [31]

Answer:

P(t) = 82,100(1.02)^t

 1.t is the time in years  

 

2.P(t) is the population after t years

 

3. 100%=1       102-100=2% so the interest rate is 2 %

   102%=1.02

 

4. after 15 year just put in term s of 't' (wich is represent the years) 15 :

Step-by-step explanation:

3 0
2 years ago
Other questions:
  • Jack is mowing a lawn that has a shed. needs to know area of lawn to mow. dimensions of yard are 5x by 13 x-4 . she'd are 2x by
    9·1 answer
  • A<br> — = c, solve for b<br> b
    5·1 answer
  • 1 2/3% of it is 4.75
    11·1 answer
  • The equation of a line is 5x plus 10y equals 15. which of the following point lines on the line?
    13·1 answer
  • A plane can fly 1020 miles in the same time as it takes a car to go 360 miles. If the car travels 110 mph slower than the plane,
    10·1 answer
  • A poll of a random sample of1400 adults reported that respondents slept an average of 6.5 hours on weekdays and 7.2 hours on​ we
    11·1 answer
  • there is a ratio of 5 girls to 3 boys in the chorus.there are 24 boys in the chorus.how many girls are in chorus
    12·2 answers
  • The regular price of a bicycle is $120. The bicycle is on sale for 20% off. Which expression is equal to the sale price, in doll
    8·2 answers
  • 9,3,1, what is the sequence and what is it equal to?
    13·1 answer
  • Which is precisely defined using the undefined terms point and plane?
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!