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
GarryVolchara [31]
3 years ago
11

When doing substitution what is the answer for -9x+2y=228, -7x-1=y

Mathematics
2 answers:
tiny-mole [99]3 years ago
8 0

Answer:

do u need to solve for x

Step-by-step explanation:

anyanavicka [17]3 years ago
7 0

Answer: x = -10, y = 69

Step-by-step explanation:

-9x+2y=228 -------------- eqn,. 1

-7x-1=y ---------------- eqn. 2

from eqn. 2 make y subject formula i.e.

y = -7x -1

substitute for y in eqn. 1

-9x + 2(-7x-1) = 228

-9x -14x - 2 = 228

collect like terms

-23x = 228 + 2

-23x = 230

x = 230/-23

x = - 10

substitute for x in eqn. 2

y =-7(-10) -1

y = 70-1

y = 69

Hence, x = -10, y = 69

kindly rate brainliest

You might be interested in
Rachel Plant has ​$28,000 invested in stock A and stock B. Stock A currently sells for ​$20 a share and stock B sells for ​$80 a
Wewaii [24]

Answer:

A= 66.6667

B = 333.3333

Step-by-step explanation:

Initial value of A = $20

Initial value of B = $80

Initial total=$ 28000

A moves up 50%= 20+(0.5*20)

A moves up 50% = 20+10

A moves up 50% =$ 30

B double it values = $80*2

B double it values = $160

Now total value is = $54000

A20+B80= 28000... equation 1

A30+B160= 54000.... equation 2

Multiplying equation 1 * 2

Multiplying equation 2 * 1

A40 +B160 = 56000

A30+B160= 54000

A30 = 2000

A= 2000/30

A= 200/3

A= 66.6667

A20+B80= 28000

Substituting A

200/3 (20) +B80= 28000

B80= 28000-4000/3

B80= 80000/3

B= 80000/240

B = 333.3333

3 0
3 years ago
Find the sum of (x+5), (-4x-2), and (2x-1)<br><br> Show your work please
Papessa [141]
Sum means add
(x+5) + (-4x-2) + (2x-1)
=-3x+3+(2x-1)
=-x+2
7 0
3 years ago
Read 2 more answers
What is 25/99 simplified
astra-53 [7]

Answer:

i dont think you can simplify it any more

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
Tad and his buddies drove to the orange bowl to see their favorite football team win the national championship because of heavy
GenaCL600 [577]

Answer:

7.2

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
What is the square root of 40 rounded to the nearest hundredths place
iren [92.7K]
The answer to the square root of 40 is 6.33
3 0
3 years ago
Other questions:
  • In order to ask me the width of a river, similar triangles can be used as shown in the diagram. Three markers O, C, and E are pl
    9·1 answer
  • Four friends shared 1/2 of one carton of orange juice and 1/4 of another carton of apple juice. What fraction of each carton of
    10·1 answer
  • 4) Determine the value of r so that a line through<br> the points (r, 2) and (4, -6) has a slope =
    11·1 answer
  • Simplify 15 + 6(x + 1).
    5·2 answers
  • Need help solving for X
    15·1 answer
  • A designer wants to create a whisper chamber in the shape of an ellipse. He has a warehouse space with a longest length of 50 ya
    6·1 answer
  • How many small cubes are needed to make the large figure shown below?
    5·1 answer
  • )If there are 6 builders, it takes 80 days to complete the house. How many builders must be employed to build the house in just
    7·1 answer
  • If 'P' and 'Q' are direct proportional , find the respective values of a, b and c in the given table.
    10·1 answer
  • In rhombus ABCD, the diagonals AC and BDintersect at E. If AE=5 and BE=12, what is thelength of AB?
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!