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
iren [92.7K]
3 years ago
13

Which of these strategies would eliminate a variable in the system of equations?

Mathematics
2 answers:
Lubov Fominskaja [6]3 years ago
5 0

Answer:

B

Step-by-step explanation:

2x-5y=13.........(1) × 3

-3x+2y=13.......(2) × 2

6x - 15y = 39

-6x + 4y = 26

Adding

6x - 6x - 15y + 4y = 13 + 13

Luden [163]3 years ago
5 0

Answer:

Step-by-step explanation:

2x - 5y = 13

-3x + 2y = 13

multiply the top equation by 3 and the bottom one by 2, then add <==

watch...

2x - 5y = 13.....multiply by 3

-3x + 2y = 13....multiply by 2

-----------------

6x - 15y = 39 (result of multiplying by 3)

-6x + 4y = 26 (result of multiplying by 2)

-----------------add

- 11y = 65.....notice how out x terms were eliminated :)

You might be interested in
Determine the perimeter of the triangle.<br> 3x<br> x + 6<br> 5x – 7
Gekata [30.6K]

Answer:

9x-1

Step-by-step explanation:

The perimeter of the triangle is adding up all 3 sides.

(3x)+(x+6)+(5x-7)=P

9x-1 = perimeter

All I have done is combine like terms.

If there is a... x = something, replace x with the number.

8 0
3 years ago
Adam's goal is to practice piano for 200 minutes every week. Which practice schedule would allow him to meet his goal?
ale4655 [162]

Answer:

40 minutes per night, 5 days per week

Step-by-step explanation:

7 0
3 years ago
The piecewise function f(x) is defined below. What is the value of f(–2)?
Usimov [2.4K]
f(-2)=3, because f(x)=3 for -2\leq x\ \textless \ 0
3 0
3 years ago
Read 2 more answers
You decide to put $2,000 in a savings account to save for a $3,000 downpayment on a new car. If the account has an interest rate
DaniilM [7]

Answer:

10.153 years

Step-by-step explanation:

The future value of such an investment is given by ...

FV = P·(1 +r/12)^(12t)

where P is the principal invested, FV is the future value of it, r is the annual interest rate, and t is the number of years.

Dividing by P and taking the log, we have ...

FV/P = (1 +r/12)^(12t)

log(FV/P) = 12t·log(1 +r/12)

Dividing by the coefficient of t gives ...

t = log(FV/P)/log(1 +r/12)/12 = log(3000/2000)/log(1 +.003333...)/12 ≈ 121.842/12

t ≈ 10.153 . . . years

6 0
3 years ago
7(3x+5) = 11 - (x +9)
nevsk [136]
The answer for this problem is X= -103
7 0
2 years ago
Read 2 more answers
Other questions:
  • Maggie has $14,100 to invest, and wishes to gain $4,000 in interest over the next eight years. Approximately what is the minimum
    15·1 answer
  • (x+4) (x+10)<br>simplify​
    5·2 answers
  • The relationship between the base and rate a plumber charges and his hourly fee is modeled by the linear function f (x) = 25x +
    8·1 answer
  • Plz help for points plzzz
    5·2 answers
  • what is the quotient of 0.457 and 0.12? round to the hundredths place show your work Will.mark brainiest
    9·1 answer
  • Solve this system of equations by using substitution<br><br> 3x + 5y = 23<br> y= x + 3
    9·1 answer
  • Give the value of the digit 8 in each number.
    12·2 answers
  • Does anyone know????
    10·2 answers
  • 100 POINTS + BRAINLIEST !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!11<br> Solve x³ - 9x^(1.5) + 8 = 0
    6·2 answers
  • Given f(x)=3x-2f(x)=3x−2, find f(-5)f(−5).
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!