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
kogti [31]
2 years ago
8

Which of the following equations shows how substitution can be used to solve the following system of equations?

Mathematics
1 answer:
igor_vitrenko [27]2 years ago
4 0

Answer:

(3, 5)

Step-by-step explanation:

y = 2x - 1

3x + 2y = 19

In the second equation, substitute 2x - 1 in for y, since y equals 2x - 1 in the first equation. Solve for x.

3x + 2(2x - 1) = 19

3x + 4x - 2 = 19

7x - 2 = 19

7x - 2 + 2 = 19 + 2

7x = 21

7x/7 = 21/7

x = 3

Pick the first equation to solve for y since it says y =. Substitute 3 in for x.

y = 2x - 1

y = 2(3) - 1

y = 6 - 1

y = 5

You might be interested in
I like Memes. Do you like memes too?
enyata [817]

Answer:

Memes are amazing.

Step-by-step explanation:

They're also how I get my news.

4 0
3 years ago
Read 2 more answers
Someone help please, i cant solve this one :|
andrey2020 [161]

Answer:

i think its B

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
Help pls giving BRAINLIEST!!!
finlep [7]

3 \sqrt{3}

please mark me as brainlist

5 0
3 years ago
Use the function r=n-7 to find the value of r when n =10​
harkovskaia [24]

Answer:

r=3

Step-by-step explanation:

if n=10

r=n-7

r=(10)-7

r=3

8 0
3 years ago
Can somebody help me on this question
Marrrta [24]
Consent is 5 coefficient is 3x hope this helps
8 0
3 years ago
Read 2 more answers
Other questions:
  • Which of the following expressions is equivalent to the expression a^2/3
    13·1 answer
  • HELP ME PLEASE GEOMOTRY QUESTION
    8·1 answer
  • Prove that if b is a square matrix then b+b^t is symmetric
    5·1 answer
  • Are the triangles congruent?<br><br>a-yes<br>b-no<br>c-not enough information<br>​
    13·1 answer
  • Plz help I'm just having a brain fart right now<br><br>​
    7·1 answer
  • What is 5 groups of 3
    9·2 answers
  • What is the rate of increase in water pressure in atm/km
    13·1 answer
  • Evaluate the expression when a=-3 and x=3.<br> 5x - a
    15·1 answer
  • HELPPPPP ME PLEASE!!!!
    12·2 answers
  • PLEASE HELP WITH MATH (50 POINTS)
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!