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
Lunna [17]
2 years ago
15

If x+y=9, and 8(x+3y)= 120, what is the value of x-y

Mathematics
1 answer:
Triss [41]2 years ago
6 0

Answer:

3

Explanation:

Apply Multiplicative Distribution Law:

{x + y =9

{8x + 24y = 120

Reduce the greatest common factor on both sides of the equation.

{x + y = 9

{x + 3y = 15

Subtract the two equations: x + y - (x +3y) = 9 - 15

Remove paranthesis: x + y - x - 3y = 9 - 15

Cancel the unknown variables: y - 3y = 9 - 15

Combine like terms: -2y=9 - 15

Calculate the sum or difference: -2y = -6

Reduce the greatest common factor on both sides of the equation: y =3

Substitute one unknown quantity into the elimination: x + 3 = 9

Rearrange unknown terms to the left side of the equation: x = 9 - 3

Calculate the sum or difference: x = 6

Write the solution set of equations: {x = 6

                                                           {y = 3

Substitute: 6 - 3

Calculate the sum or difference: 3

Answer: 3

You might be interested in
Find the volume of the figure. Round your answer to the nearest tenth if necessary
Stella [2.4K]
  1. The answer would be V= 192k
8 0
3 years ago
Solve each system by graphing:<br> Y= 1/4x-4 <br> Y= -x+1
AlexFokin [52]
Do you have a graphing calculator?  if yes than all you have to do is hit the y= button in the top left corner and type 1/4x-4 for y1. then you need to hit graph in the top right corner.  repeat this process substituting 1/4x-4 and -x+1
4 0
3 years ago
Help! please give steps :) thanks 20pts
luda_lava [24]
Hello,
26.
period=4
max=3
min=-3

27:
p=8
max=5
min=0

28:
p=8
max= 4 (twice)
min=-4 (twice)


8 0
3 years ago
Read 2 more answers
Which decimal number is represented by the shaded portion of the model?
deff fn [24]
The person on top might be a scam seen the same url too many times. J
7 0
3 years ago
Read 2 more answers
What is the measure of the missing exterior angle?
larisa86 [58]

Answer:

the missing angle is 148°

Step-by-step explanation:

the sum of all exterior angles of a triangle are 360°

so, 360-138-74 = 148°

3 0
3 years ago
Other questions:
  • Write the equation of the circle in general form. Show your work.
    13·1 answer
  • How is interest similar to sales tax in markup
    11·1 answer
  • Which exponential expression represents the numerical expression 7⋅7⋅7⋅7?
    6·1 answer
  • 9 times as much as 7 tenths
    9·2 answers
  • Write a polynomial function of minimum degree with real coefficients whose zeros include those listed. Write the polynomial in s
    15·2 answers
  • Brass is an alloy created using 80% copper and 20% zinc. If Henri's brass trumpet contains 48 ounces of copper, how many ounces
    6·1 answer
  • What’s the answer to this ? I can’t find it out
    12·1 answer
  • Which values complete the function?<br> f(x) = (x-__ )(x+___)
    10·1 answer
  • I’m so confused. Can someone please help?
    13·1 answer
  • You bet $7 on a local race being held for charity. The payoff odds given by the charity event are 12:1. Find your net profit for
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!