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
mart [117]
3 years ago
11

2x-y and 7y= -7 +3x solve by substitution

Mathematics
1 answer:
miss Akunina [59]3 years ago
7 0

Answer:

x = -7/11, y = -14/11

Step-by-step explanation:

2x = y ------- (1)

7y = -7+3x -------- (2)

from (1)

2x = y

y = 2x ------- (3)

substitute (3) into (2)

7y = -7+3x

7(2x) = -7+3x

14x = -7+3x

14x-3x = -7

11x = -7

x = -7/11

substitute x = -7/11 into (3)

y = 2x

y = 2(-7/11)

y = -14/11

x = -7/11, y = -14/11

You might be interested in
1.<br>Rakesh can complete a work in 20 days. What part of the work can he <br>complete in 4 days?​
3241004551 [841]

Answer:

5 percent

Step-by-step explanation:

fnmdmrnrnrndndjxkdkekensnsnzksndkdd

7 0
3 years ago
Lisa had 1750 stamps. Mark had 480 fewer stamps than Lisa. Lisa gave some stamps to Mark. Now Mark has three times as many stamp
FrozenT [24]
L: 1750, M:1750-480=1270
Lisa gave some stamps to Mark so Lisa now has 1750-x and Mark has 1270+x. Mark also has 3 times as many as Lisa now: (1750-x)*3=1270+x
5250-3*x=1270+x
4*x=3980, x=3980/4, x=995
So Lisa gave 995 stamps to Mark.
At first Mark had 1270 stamps. Lisa now has 1750-995=755 stamps.
7 0
3 years ago
Read 2 more answers
I need help with all except graph on first question please! Work shown or not doesn’t matter
Jobisdone [24]

Answer:

y = 7/5x + 18/5

Step-by-step explanation:

so we have y = mx + b

f(1) = 5

f(-4) = -2

so let's find b

so like if you do (5 - (-2))/(1 - (-4)) you get (5 + 2)/(1 + 4) = 7/5

y = 7/5x + b

so now we can plug in a value like f(1) = 5

5 = (7/5)1 + b

b = 18/5

5 0
3 years ago
Geometric mean of 12 and 16
Leviafan [203]
The answer is approximately 13.8564.
6 0
4 years ago
How would you find the parallel and perpendicular line of y=4x+3​
kirza4 [7]
Parallel would be anything with the slope of 4x and perpendicular would be anything with the slope of 1/4
5 0
4 years ago
Other questions:
  • AWNSER plz as soon as possible
    12·1 answer
  • The scale on a map said that 1/2 inch represent 3 miles. if 2 towns are 3 inches apart on the map ,what is the actual distance b
    6·2 answers
  • The price of one gallon of milk has increased from$3.24 to $4.06. What is the percentage increase
    9·1 answer
  • Can someone help me with question #11
    8·1 answer
  • When the sum of a number and 5 is divided by 2, the results is 11. What is the number?
    10·2 answers
  • Samin can run 5 kilometres in 30 minutes. Assuming she keeps a constant pace, how many kilometres can she run in 45 minutes?
    11·1 answer
  • I dont know how she got her anser pleas help
    9·1 answer
  • Bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
    15·2 answers
  • PLEASE ASAP ILL GIVE BRAINLIEST.
    7·1 answer
  • A tobelerone chocolate bar is shown below find the volume of the bar
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!