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
tino4ka555 [31]
1 year ago
15

What is the answer to this system of equations? 2x - 3y= 21 and -6x + 2y = 7.

Mathematics
1 answer:
allsm [11]1 year ago
5 0

answer:

x = - 9/2

y = -10

Step-by-step explanation:

make both equations look like y =

2x-3y=21 -> -3y= -2x+21 -> y = (-2x+21)/-3 -> y = 2/3x - 7

-6x + 2y = 7 -> 2y = 6x + 7 -> y = 3x + 7/2

now make the equations equal to each other (since they both equal y)

get x

2/3x - 7 = 3x + 7/2

-7 -7/2 = 3x - 2/3x

-14/2 -7/2 = 9/3x - 2/3x

-21/2 = 7/3x

(3/7) -21/2 = x

x = (3/7) -21/2

x = - 63/14

x = - 9/2

put it back in an equation to get y

y = 3x + 7/2

y = 3(-9/2) + 7/2

y = -27/2 + 7/2

y = -20/2

y = - 10

brainly.com/question/12203001

You might be interested in
Three times the sum of a number and 5 is 4
galben [10]

i think it is 27 i did 5+4 then i did 9x3 and got 27


4 0
3 years ago
Read 2 more answers
7 times a number is 3 thousand 5 hundered what is the number
babymother [125]
The number is 500. 500×7=3,500.
6 0
3 years ago
Read 2 more answers
Identify the domain and range of y = 4x - 5 + 3
Zepler [3.9K]

Answer:

\huge\boxed{\text{Domain:}\ D=\mathbb{R}=(-\infty;\ \infty)}\\\boxed{\text{Range:}\ R=\mathbb{R}=(-\infty;\ \infty)}

Step-by-step explanation:

y = 4x - 5 + 3 = 4x - 2

It's an equation of a line in the slope-intercept form.

y = 4x - 2 → f(x) = 4x - 2 - it's a lienar function.

The domain of a linear function is the set of all real numbers.

If a slope of linear function is different than 0, then the range is the set of all real numbers.

5 0
3 years ago
Help me and i will give u a brainlliest
DanielleElmas [232]

Answer:

5

5

1/3

Step-by-step explanation:

4 0
3 years ago
Bella is shopping for a 60" TV. She has found the following options that she likes. Bella wants to get the best deal on her TV.
Sidana [21]

Answer:

TV #3

Step-by-step explanation:

The others cost more.

7 0
3 years ago
Other questions:
  • If f(x) = 5x, what is f-1x
    5·1 answer
  • Maria's school raised 23,240 in magazine sales and Cole's school raised 16,502. About how much more money did Maria's school rai
    9·2 answers
  • Of the 420 sandwiches Joanna makes 20% are tuna sandwiches 40% are are ham sandwiches and the rest are egg sandwhiches.How.many
    14·2 answers
  • Hello, please help me with this question. Thank you.
    14·1 answer
  • Please add the numbers to the graph and show the work on a paper and post it please if you do not know the answer do not comment
    5·1 answer
  • 22 quarts of orange juice is available. How many gallons of orange juice is available?
    7·1 answer
  • A school club sold 300 shirts. 31% were sold to fifth graders, 52% were sold to sixth graders, and the rest were sold to teacher
    13·2 answers
  • Very simple yes no questions
    13·1 answer
  • Which list orders the numbers from least to greatest
    10·1 answer
  • How can you simplify 24 to 96 ​
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!