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
Artemon [7]
3 years ago
9

Slove by using elimination 3x+7y=27 -3x+y=21

Mathematics
1 answer:
tankabanditka [31]3 years ago
8 0

Answer:

x = -5

y = 6

Step-by-step explanation:

3x + 7y = 27      --------------(I)

-3x + y = 21        -----------(II)

Add equation (I) & (II) and so x will be eliminated and we can find the value of y.

(I)      3x + 7y = 27    

(II)    <u> -3x + y = 21  </u>      {add}

                8y = 48

                   y = 48/8

                   y = 6

Plugin y = 6 in equation (I)

3x +7*6 = 27

3x + 42 = 27

       3x = 27 - 42

       3x = -15

         x = -15/3

x = -5

You might be interested in
Determine the area of the rectangular ABCD with AB=5cm and BC=3cm. A 5cm B 3 cm D C с Determine the area of the triangular AB wi
lbvjy [14]
Ac is 20cm and an is 5 cm u jus have to add them together
7 0
2 years ago
What is the order of operation of 100 + 6² - 9
Kipish [7]
Okay so you would use PEMDAS (parentheses, exponents, multiply, divide, add, and subtract) so there are no parentheses so you do the exponents
{6}^{2}  =  36
then you do the rest so 100+36=136 and then 136-9=127 so the answer is 127
6 0
3 years ago
Type the correct answer in each box. Use numerals instead of words. What is the y intercept of this quadratic function f(x)=-x*2
grandymaker [24]

Answer:

Y-intercept is (0, -22)

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
What is the expression for "the difference of 3 and 5 times a number"
soldi70 [24.7K]
(3 - 5)x

Hope this helps! :)
8 0
3 years ago
Read 2 more answers
Please help. its on zearn name the coordinates of each shape<br>​
Allisa [31]

Answer:

circle: 2, 1/2

square: 1 1/2, 3 1/2

triangle: 0, 4 1/2

7 0
2 years ago
Read 2 more answers
Other questions:
  • In AABC, the measure of 2C=90°, the measure of ZA=57°, and CA = 2.6 feet. Find
    12·1 answer
  • When segments intersect inside a circle, what is the relationship between the angle of intersection and the intercepted arcs?
    6·2 answers
  • Find the coordinates of the point(s on the curve 2y=10?x2 that are closest to the origin
    12·1 answer
  • 1+14554345555556675566669877
    6·2 answers
  • What is 15 1/8 - 1 3/5
    10·2 answers
  • PLZ LOOK AT THE PICTURE AND HELP ME. ALSO EXPLAIN HOW U GOT THE ANSWER
    14·1 answer
  • The augmented matrix of a consistent system of five equa- tions in seven unknowns has rank equal to three. How many parameters a
    8·1 answer
  • Four darts are thrown at this dartboard. If all four darts hit the board, how many different point totals are possible. (Dartboa
    15·1 answer
  • A section of land measuring 2 2/5 acres is divided equally among three brothers. How many acres will each brother receive? *
    12·1 answer
  • In Exercises 8-10, sketch the figure described.
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!