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
egoroff_w [7]
2 years ago
9

100 POINTS solve the system using linear combination. show all work.{ 5x + 3y = 41 {3x - 6y = 9

Mathematics
2 answers:
sleet_krkn [62]2 years ago
6 0
5x+3y = 41 multiply whole thing by -2 so the y’s cancel out
3x-6y = 9

Becomes
-10-6y=-82
- subtract
3x-6y = 9

=
-13x+0y=-91
X=7

Plug in x to find y
3(7)-6y=9
21-6y=9
Y=2


PIT_PIT [208]2 years ago
4 0

Answer:

y = 2

x = 7

Explanation:

  • 5x + 3y = 41
  • 3x - 6y = 9

<u>Make the coefficient of "y" in equation 1 same</u>

{ 5x + 3y = 41 } * 2     →  10x + 6y = 82  ........equation 1

                                  →  3x - 6y = 9 ........equation 2

<u>solving them using linear combination</u>

  • 10x + 6y = 82
  • 3x - 6y = 9

     ============

  • 13x = 91
  • x = 7

Find y:

  • 5x + 3y = 41
  • 5(7) + 3y = 41
  • 3y = 41 - 35
  • 3y = 6
  • y = 2
You might be interested in
In your own words, explain 3 or more sentences "how do you multiply rational number?" Tell how the signs, negative and positive,
vagabundo [1.1K]

Answer:

Rules & Examples of Integers multiplication.

Step-by-step explanation:

A rational number  is a number that can be expressed as a fraction of integers (positive or negative numbers). Every integer is a rational number.

They are multiplied based on following rules :

  • Positive (+) x Positive (+) = Positive (+) , +2 x +2 = 4
  • Positive (+) x Negative (-) = Negative (-) , +2 x -2 = -4
  • Negative (-) x Positive (+) = Negative (-) , -2 x +2 = -4
  • Negative (-) x Negative (-) = Positive (+) , -2 x -2 = 4

8 0
3 years ago
Read 2 more answers
Helpp!!
IRISSAK [1]

Answer:

15 seventh graders

Step-by-step explanation:

1/5 of 75 is 15

6 0
3 years ago
Read 2 more answers
Can I simplest 48/30
brilliants [131]
Yes. it would be 1 and 18/30 or 1 9/15. it can also be 1 and 3/5 or 8/5
7 0
3 years ago
Read 2 more answers
(x^2 + 5x + 2) – (5x^2 – x – 2) =
zlopas [31]

Answer:

{ \tt{( {x}^{2} + 5x + 2) - (5 {x}^{2} - x - 2)  }} \\  = { \tt{(1 - 5) {x}^{2}  + (5 + 1)x + (2 + 2)}} \\  = { \tt{ - 4 {x}^{2} + 6x + 4 }} \\  = { \tt{ - 2(2 {x}^{2} - 3x - 2) }}

3 0
3 years ago
Read 2 more answers
Mathswatch Question! Mr Powers checks his electricity bill. Here are his meter readings. New reading: 6538 units, Old reading: 6
Setler79 [48]

Answer:

Cost = 284 x

Step-by-step explanation:

Given

Old = 6245\ units

New = 6538\ units

Required

The cost of units used

First, calculate the number of units used.

Units = New - Old

Units = 6538 - 6254

Units = 284

Next, multiply the units used by the cost per units,

Since the cost per unit is not given, we assume that it is x.

So, the total cost is:

Cost = Units * Cost\ per\ units

Cost = 284 * x

Cost = 284 x

3 0
3 years ago
Other questions:
  • Please help. if right i will give brainliest
    9·2 answers
  • Y=x<br> 8x+2y=70<br> How do you solve this
    7·2 answers
  • A truck rental company charges a $25 rental fee when someone rents.a
    9·2 answers
  • What is 2/3 into a decimal
    13·2 answers
  • Rewrite y + 3 = 0 using function notation.
    8·2 answers
  • Scientists think that robots will play a crucial role in factories in the next several decades. Suppose that in an experiment to
    15·1 answer
  • The U.S. quarter has a mass of 5.67 g and is approximately 1.55 mm thick.How many quarters would have to be stacked to reach 575
    12·1 answer
  • 3/10 divided by 6/11
    12·1 answer
  • CAN ANYONE HELP ME WITH THIS
    6·1 answer
  • Please help guys love you
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!