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
Oliga [24]
3 years ago
5

Could someone help me do this using substitution I don't know how to do this for math

Mathematics
2 answers:
umka21 [38]3 years ago
5 0
X=y-7 and x=2-8y  if there is a solution x=x so

y-7=2-8y  add 7 to both sides

y=9-8y   add 8y to both sides

9y=9  divide both sides by 9

y=1, and since x=y-7

x=1-7=-6

So the solution is the point (-6, 1)
gizmo_the_mogwai [7]3 years ago
5 0
If X=y-7 you put that into the other problem: y-7=2-8y. Then you combine like terms: 9y=9. Get the unknown by itself: divide both sides by 9: y=1. Then you put what y= into the first problem: X=1-7 then X=-6.
So X=-6, Y=1. :) hope this helps!
You might be interested in
(GIVING BRAINLYIST) 5 cakes are shared equally between 6 people. What fraction of a cake does each person receive? use fraction
Keith_Richards [23]

Answer:

5/6

Step-by-step explanation:

5/1 cakes shared by 6/1 people. To divide, we can freeze flip and multiply the fractions to get to 5/1 * 1/6 = 5/6 cakes per person. Let me know if this helps.

5 0
3 years ago
Read 2 more answers
What is the lcd of (3x)/(x + 3), 3/(x ^ 2 - 9)
Rudik [331]

Answer:

Simplify the denominator.

Tap for more steps...

x

(

x

+

3

)

(

x

−

3

)

⋅

3

x

x

2

−

5

x

+

6

Factor

x

2

−

5

x

+

6

using the AC method.

Tap for more steps...

x

(

x

+

3

)

(

x

−

3

)

⋅

3

x

(

x

−

3

)

(

x

−

2

)

Finding the LCD of a list of values is the same as finding the LCM of the denominators of those values.

(

x

+

3

)

(

x

−

3

)

,

(

x

−

3

)

(

x

−

2

)

The LCM is the smallest positive number that all of the numbers divide into evenly.

1. List the prime factors of each number.

2. Multiply each factor the greatest number of times it occurs in either number.

The number

1

is not a prime number because it only has one positive factor, which is itself.

Not prime

The LCM of

1

,

1

is the result of multiplying all prime factors the greatest number of times they occur in either number.

1

The factor for

x

+

3

is

x

+

3

itself.

(

x

+

3

)

=

x

+

3

(

x

+

3

)

occurs

1

time.

The factor for

x

−

3

is

x

−

3

itself.

(

x

−

3

)

=

x

−

3

(

x

−

3

)

occurs

1

time.

The factor for

x

−

2

is

x

−

2

itself.

(

x

−

2

)

=

x

−

2

(

x

−

2

)

occurs

1

time.

The LCM of

x

+

3

,

x

−

3

,

x

−

3

,

x

−

2

is the result of multiplying all factors the greatest number of times they occur in either term.

(

x

+

3

)

(

x

−

3

)

(

x

−

2

)

Step-by-step explanation:

there does that help

6 0
3 years ago
The graph of which function(s) will contain the point (3, 6)?
alekssr [168]
The first and third one
5 0
3 years ago
Read 2 more answers
There is a bag with only red marbles and blue marbles.The probability of randomly choosing a red marble is59.There are 63 marble
Elis [28]

Answer:

37

Step-by-step explanation:

59 percent times 63 in total marbles is 37

7 0
2 years ago
Consider the line y=9x-8
jasenka [17]

Answer:

y=9x+75

Step-by-step explanation:

since we know that the slope must be the same for two lines to be proportional, we are gonna start there.

so our equation is: y= 9x + b

we need to find b to complete our equation, so substitute in the points we were given.

3 = 9(-8) + b

so now,

3 = -72 + b

now we have to isolate b to find out what it is,

3  =  -72 + b

+72   +72

so now: 75= b

Put that back into the starting equation: y = 9x + 75

7 0
3 years ago
Other questions:
  • Can someone break this down for me!! I'm stuck
    12·1 answer
  • Zaire sells 24 slices of blueberry pie and 15 slices if cherry pie. what was his profit?
    9·1 answer
  • Choose the kind or kinds of symmetry the following figure
    5·1 answer
  • Harry said that he got a 15% bonus in his paycheck. If the bouns was $250 how much was his paycheck
    7·1 answer
  • Find the area of a regular octagon with apothem K and side of 10.
    11·1 answer
  • A school principal estimates that no more than 6% of this years senior class will graduate with honors. There are 350 students.
    7·2 answers
  • Mr. pope lost 10 pounds in one month. At the end of the month, he weighed 240 pounds. By what percentage did Mr. Pope decrease h
    12·1 answer
  • Three times the square of a number is 6 more than<br> twice the number. What is the number?
    9·2 answers
  • A rectangular prism-shaped fish tank is 14 inches tall. The base of the tank has a length of 36
    6·1 answer
  • I will give brainliest if applicable
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!