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
saveliy_v [14]
3 years ago
13

What is the result of subtracting the second equation from the first? -2x+y=0 7x+3y=2

Mathematics
1 answer:
ikadub [295]3 years ago
4 0

Answer:

5x -2y = -2

Step-by-step explanation:

-2x+y=0

-7x+3y=2

Subtract the second equation from the first

-2x+y=0

7x-3y=-2

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

5x -2y = -2

You might be interested in
Given vectors u = (−1, 2, 3) and v = (3, 4, 2) in R 3 , consider the linear span: Span{u, v} := {αu + βv: α, β ∈ R}. Are the vec
julia-pushkina [17]

Answer:

(2,6,6) \not \in \text{Span}(u,v)

(-9,-2,5)\in \text{Span}(u,v)

Step-by-step explanation:

Let b=(b_1,b_2,b_3) \in \mathbb{R}^3. We have that b\in \text{Span}\{u,v\} if and only if we can find scalars \alpha,\beta \in \mathbb{R} such that \alpha u + \beta v = b. This can be translated to the following equations:

1. -\alpha + 3 \beta = b_1

2.2\alpha+4 \beta = b_2

3. 3 \alpha +2 \beta = b_3

Which is a system of 3 equations a 2 variables. We can take two of this equations, find the solutions for \alpha,\beta and check if the third equationd is fulfilled.

Case (2,6,6)

Using equations 1 and 2 we get

-\alpha + 3 \beta = 2

2\alpha+4 \beta = 6

whose unique solutions are \alpha =1 = \beta, but note that for this values, the third equation doesn't hold (3+2 = 5 \neq 6). So this vector is not in the generated space of u and v.

Case (-9,-2,5)

Using equations 1 and 2 we get

-\alpha + 3 \beta = -9

2\alpha+4 \beta = -2

whose unique solutions are \alpha=3, \beta=-2. Note that in this case, the third equation holds, since 3(3)+2(-2)=5. So this vector is in the generated space of u and v.

4 0
3 years ago
You make $10 on the first day, $20 on the second day, $40 on the third day, $80 on the fourth day, and so on. What is your total
Trava [24]
The answer to this question is 5,120 you have to multiply by 2
4 0
3 years ago
When a decimal is written in word form, what indicates whether the number can be written as a mixed number or as a fraction less
vekshin1

9514 1404 393

Answer:

  "and"

Step-by-step explanation:

Properly written, the word "and" separates the integer portion from the fractional portion of the number. If there is no "and", then there is no integer portion, so the number is a fraction less than 1.

<u>Examples</u>:

one <em>and</em> three tenths = 1 3/10

thirty-one thousandths = 31/1000

8 0
3 years ago
How many solutions does this equation have 3(x+1)-5=3x-2
4vir4ik [10]

Answer:

Infinite.

Step-by-step explanation:

3(x+1)-5=3x-2

3x+3-5=3x-2

3x-2=3x-2

True for any number.

6 0
3 years ago
Read 2 more answers
Which undefined term is needed to define a circle?
Solnce55 [7]
A Point is needed to define a circle Hope this helps!!!
3 0
3 years ago
Other questions:
  • PLEASE HELP ASAP, Thank you :)
    12·1 answer
  • someone thinks of a number when he multiplied his number by 5 and subtracts 16 from the result he gets the same answer as when h
    15·1 answer
  • In a newspaper, it was reported that yearly robberies in Springfield were up 50% to 93 in 2013 from 2012. How many robberies wer
    10·2 answers
  • Help me pls :( I don't understand it!!
    10·1 answer
  • Timothy is trying to solve the following equation for his math homework.
    10·1 answer
  • Farmer frank is planting corn in a three-acre field.He will plant a total of 347 rows with 270 corn plants in each row.How many
    5·2 answers
  • The diameter of Debby’s bicycle tire is 24 inches. What is
    8·1 answer
  • Logan takes 8.95 minutes to run 1 mile.
    11·2 answers
  • Math help please and thank you!
    6·1 answer
  • A concession stand owner bought some bottles of water for $0.75 each and began selling them for $1.25 each. When he made back al
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!