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
Vlad1618 [11]
3 years ago
10

−3x + 7y = −16 −9x + 5y = 16 slove this

Mathematics
1 answer:
Ahat [919]3 years ago
5 0


{-3x+7y=-16 ⇒ -3x=-16-7y    (↓)

{-9x+5y=16

The second equation:

-9x+5y=16

3*(-3x)+5y=16         <em>Substitute -3x    (↑)</em>

<em>3* </em>(-16-7y)+5y=16

-48-21y+5y=16      /+48

-16y=64      /:(-16)

y=-4

-3x=-16-7y

-3x=-16-7*(-4)=-16+28=12

-3x=12    /:(-3)

x=-4

<em /><em>Solution: (-4; -4)</em>



You might be interested in
Arrange the following from least to greatest 0.08,0.1, 1.8, 0.049, 0.103
8_murik_8 [283]
0.049, 0.08, 0.1, 0.103, 1.8.
3 0
3 years ago
What is equivalent to 2/5?
zhuklara [117]
As in decimal it would be 0.4 but if you want a fraction it could be 4/10

3 0
3 years ago
What is 40 divided by five
trapecia [35]
40÷5= 8 You have to see how many time 5 can go into 40 
1. see how many times 5 goes into 4 none so the first number is 0
2. then you see how many time 5 can go into 0 o times
3. so you have to see how many time you can count 5 into 40 
(count by 5's) 5,10,15,20,25,30,35,40 that should be 8 times total!
4 0
3 years ago
Danny walks at an average speed of 5 m/s foe 1 minute. Work out the distance that Danny has travelled in metres.
Dahasolnce [82]

Answer:

D = 300 m

Step-by-step explanation:

<u><em>Given :</em></u>

Speed = 5 m/s

Time = 1 min = 60 secs

<u><em>Required:</em></u>

Distance = ?

<u><em>Formula :</em></u>

Speed = Distance/Time

<u><em>Solution:</em></u>

Distance = Speed × Time

D = 5 × 60

D = 300 m

4 0
3 years ago
Read 2 more answers
Analyze the dot plots. What is the difference between the medians of the two data sets? mm
Anettt [7]

Answer:

4

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
Other questions:
  • What things Are a decameter long
    5·2 answers
  • The table shows the annual profits (in thousands of dollars) of a county fair from 2008 to 2012. What must the 2012 profit be (i
    5·2 answers
  • 8 1/6 divide 1 7/8? <br><br> The quotient is close to _____
    11·1 answer
  • Please help me with this (and my other questions) thanks
    14·1 answer
  • Find the arc length of a partial circle
    8·2 answers
  • How do you find a scale factor?
    15·1 answer
  • Helphelphelphelper herlllllllllllllllllllllpppppppp
    6·1 answer
  • Help!!! <br> 1/3x - 3/4 + 5/6x = -2
    9·1 answer
  • Need desperate help thanks
    11·1 answer
  • Solve for m.
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!