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
777dan777 [17]
3 years ago
10

What is the first step in solving the following system of equations? 3 x + y = 23. 8 x + 2 y = 23. Substitute the value of y fro

m one equation into the other equation. Solve the first equation for y. Subtract the second equation from the first equation. Substitute the value of x from one equation into the other equation.
Mathematics
2 answers:
Taya2010 [7]3 years ago
5 0

Answer:

B

Step-by-step explanation:

Our system of equations is:

3x + y = 23

8x + 2y = 23

If we want to use substitution, that means that we essentially want to manipulate one of the two equations so that one variable (like y) is written in terms of the other (like x), and then substitute that expression into the second equation so that we have one variable and one equation and we can easily solve from there.

So the first thing to be done is to write one of the variables in terms of the other. It would be easiest to do it with the first equation and write y in terms of x - in other words, "solve the first equation for y".

The answer is B.

vlada-n [284]3 years ago
3 0

Answer:

Second option:

Solve the first equation for y.

Step-by-step explanation:

3 x + y = 23 (1)

8 x + 2 y = 23 (2)

To solve this system, first step is to make y the subject from (1)

y = 23 - 3x

You might be interested in
ASAP help and explain plz
navik [9.2K]
12x is the correct answer

8 0
3 years ago
Factorise the following:<br> c) x - 3x + 2
fenix001 [56]

Answer:

2 ( - x + 2 )

Step-by-step explanation:

x - 3x + 2 = - 2x + 2

- 2x = 2 * - x

2 = 2 * 1

- 2x + 2 = 2 ( - x + 2 )

Hence factorized.

8 0
2 years ago
Read 2 more answers
15 _2_3 = 9<br> Fill in the gaps from left to right.
ruslelena [56]
15-2x3=9 following the rule of PEMDAS
8 0
2 years ago
Read 2 more answers
13. Describe the system by substitution:<br> y=x-7<br> 2x - y = 3
torisob [31]

Answer:

x = y + 7 \\  \\ x =  \frac{3 + y}{2}  \: or \: y = 2x - 3

Step-by-step explanation:

1. \: 2x = 3 + y \\ 2. \: x =  \frac{3 + y}{2}  \: or \: y = 2x - 3 \\  \\ 1. \: y + 7 = x \\ 2. \: x = y + 7

4 0
2 years ago
Hello can you help me with this?
zavuch27 [327]

Answer:

x = 25.5

Step-by-step explanation:

suppose RS and MQ are parallel the sum of angle MRS and RMN would be 180 degrees

2x + x + x 78 = 180 add like terms then subtract 78 from both sides

4x = 102 divide both sides by 4

x = 25.5

3 0
3 years ago
Other questions:
  • 416 is what percentage of 523
    5·1 answer
  • The semicircle shown at left has center X XX and diameter W Z ‾ ​WZ ​ ​​ start overline, W, Z, end overline. The radius X Y ‾ ​X
    7·1 answer
  • Jayden wants to lay sod on his front yard and on half of his back yard. His front yard has a length of 50 feet and a width of 80
    12·1 answer
  • Estimate 15 square root to the nearest ten
    6·1 answer
  • What is the exact area of a circle with a diameter of 18 feet?
    7·1 answer
  • VelS
    12·1 answer
  • CAN someone pls help me!!!
    8·1 answer
  • Which statement(s) describe the graph of the equation x=-2? Select all that apply
    7·1 answer
  • A recipe calls for 1/4 cup of apples and 3/8 cup of peaches. how many total fruit will Be used it the recipe. (I'm to lazy to tr
    8·1 answer
  • Pauline invested $6,700 at a simple interest rate of 2%. If the maturity value of the investment was $7,169, how long did Paulin
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!