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
kramer
3 years ago
5

Solve each system by elimination 6x+3y=21 -12x+y=-7

Mathematics
2 answers:
Olenka [21]3 years ago
5 0

Answer:

x=1,y=5

Step-by-step explanation:

6x+3y=21....(1)

-12x+y=-7.....(2)

From (2) make y the subject of formula

y=-7+12x...(3)

Substitute (3) into (1)

6x+3(-7+12x)=21

6x-21+36x=21

Collect like terms

6x+36x=21+21

42x=42

Divide both sides by 42

x=1

Substitute the value of x into (3)

y=-7+12(1)

y=-7+12

y=5

Therefore x=1,y=5

AnnyKZ [126]3 years ago
4 0

Answer:

(x,y)=(1,5)

Step-by-step explanation:

6x+3y=21/*2

-12x+y=-7

12x+6y=42 (1)

-12x+y=-7 (2)

(1)+(2): 7y=35

-12x+y=-7

y=35/7

-12x+y=-7

y=5

-12x+5=-7

y=5

-12x=-7-5

y=5

-12x=-12

y=5

x=-12/(-12

y=5

x=1

(x,y)=(1,5)

You might be interested in
How to solve this problem?
makkiz [27]
The answer is c because, if u change 15% to a decimal (0.15) then u get 5,250 and when u add that to 35,000 you get 40,250
3 0
3 years ago
I need help , help me I'll help you back at the same time
iragen [17]
All that you are doing is trying to fiigure out the Frequency of all the tally marks!!

4 0
3 years ago
after five days in her new job, karen has $800 in her bank account. if she is adding exactly $50 to her account each day, when w
Colt1911 [192]

Answer:

After 4 more days

Step-by-step explanation:

The remaining amount of money needed to reach the goal is $200 this is because 1000-800=200

Now we divide the 200 by the amount Karen  earns a day

200/50=4

That means after 4 more days Karen will have $1000

8 0
3 years ago
What is the approximate area of the shaded sector in the circle shown below?
Veronika [31]

Answer:

11.45

Step-by-step explanation:

8 0
3 years ago
Suppose you have 12 coins that total 32 cents . Some of the coins are nickels and the rest are pennies . How many of each coin d
mario62 [17]
You will need 6 coins of 5
and 2 coins of 1
hope it helps

=)   = )

8 0
3 years ago
Other questions:
  • 2,500 centimeters are equal to how many meters
    10·1 answer
  • A cupboard contains 5 pairs of shoes, each of a different style. How many ways are there to select 4 of the shoes from the cupbo
    14·1 answer
  • A castle has 34 small rooms and 47 large rooms. Each room has 32 candles in it. Which is the best estimate for the number of can
    10·2 answers
  • Find the constant of proportionality (r) in the equation y = rx
    15·1 answer
  • PLEASE HELP‼️‼️<br> A<br> B<br> C<br> D
    9·2 answers
  • nick has to build a brick wall. Each row of the wall requires 6/2 bricks. There are 10 rows in the wall. How many bricks will ni
    10·1 answer
  • Write an equation of the line in slope intercept form that passes through the given points (2,3) 6,5)
    10·1 answer
  • How u solve these I don’t get it :h
    5·1 answer
  • Determine the y-intercept of the straight line - 3y = -3x + 15<br>​
    10·1 answer
  • A
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!