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
hram777 [196]
1 year ago
14

Please tell me the number four and five instructions are solve the system of simultaneously equation by using the substitution m

ethod 100 points please help

Mathematics
2 answers:
swat321 year ago
7 0

Answer:

1) x = 2 and y = -2

2) x = 6 and y = 5

3) x = 2 and y = -4

Step-by-step explanation:

1) 3x + y = 4

since y = -x subtitute it in the equation

3x + (-x) = 4

3x - x = 4

2x = 4

x = 4\2

x = 2

y = -2

2) 4x - y = 19

since y = x - 1 subtitute it in the equation

4x - (x - 1) = 19

4x - x + 1 = 19

3x = 19 - 1

3x = 18

x = 18\3

x = 6

y = 6 - 1 = 5

3) y = 3x - 10

y - 3x = -10

since 2x + y = 0

thus y = -2x subtitute in equation

-2x - 3x = -10

-5x = -10

x = -10\-5

x = 2

y = -2 * 2 = -4

Alex777 [14]1 year ago
4 0
4. 3x+(-x)=4
3x-x=4
2x=4
x=4/2
answers:
x=2
y=-2


5.
y=x-1
4x-y=19
-x+y=-1
4x-y(cross the y’s out they cancel eachother)=19
3x=18
x=6
-6+y=-1
y=-1+6
y=5
answers:
x=6
y=5
You might be interested in
The sum of two numbers is 61 . The larger number is 5 more than the smaller number. What are the numbers?
Elanso [62]

Answer:

35.5 and 25.5

Step-by-step explanation:

all you have to do is take 61÷2=30.5 and you add five to one of the halves, and subtract five form the other.


61÷2= 30.5

30.5+5= 35.5

30.5-5= 25.5

6 0
3 years ago
What is the area of 3.14 x 20
7nadin3 [17]

Answer:

62.8

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
Help with this please 
emmainna [20.7K]
\bf \begin{array}{llll}
step~1&4x=28\\\\
step~2&x=\cfrac{28}{4}\impliedby \textit{she did not divide 28 by 4}
\end{array}

7 0
3 years ago
Select the correct answer from each drop-down menu.<br>Shape I is similar to shape II.​
SIZIF [17.4K]

Answer:

Translation (moving the figure) will map figure 1 onto figure 2 and then after this , dilation by a scale factor of "2"

3 0
3 years ago
Read 2 more answers
20 POINTS !! IF YOU ANSWER THE QUESTIONS !
tatuchka [14]
12 the answer is 12 I know it
6 0
2 years ago
Other questions:
  • It costs $2.00 per hour to park in the parking deck. Ben parks for 3 hours. The automated machine used for payment will only acc
    14·2 answers
  • Use the bar graph to find the experimental probability of the event.
    13·1 answer
  • Qué pasa si pones incorrectamente los números en una suma
    9·1 answer
  • A self storage center is a storage room that is 8 feet long, 6 feet wide, and 10 feet high. What is the volume of the room? 24 c
    8·1 answer
  • Help with these question
    11·1 answer
  • 0.046666666666667 Rounded to the nearest cent
    6·1 answer
  • Who believed that humans should<br> not base beliefs on tradition or<br> authority
    13·1 answer
  • Complete the similarity statement for the similar figures then find the scale factor
    12·1 answer
  • Dlane, Jim, and Ravi have a total of $62 in their wallets. has 2 times what Ravi has. Ravi has $10 more than Dlane How much do t
    14·1 answer
  • Mark owns a personal training business. He makes a total of $500 for every 3 clients he acquires.
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!