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
Zielflug [23.3K]
2 years ago
9

Does the system have one solution,no solution,or infinitly many? Use substitution to justify your answer

Mathematics
1 answer:
Bad White [126]2 years ago
3 0

Answer:

(0,3) One solution

Step-by-step explanation:

Step: Solve x+5y=15for x:

x+5y=15

x+5y+−5y=15+−5y(Add -5y to both sides)

x=−5y+15

Step: Substitute −5y+15for x in 7x+2y=6:

7x+2y=6

7(−5y+15)+2y=6

−33y+105=6(Simplify both sides of the equation)

−33y+105+−105=6+−105(Add -105 to both sides)

−33y=−99

−33y

−33

=

−99

−33

(Divide both sides by -33)

y=3

Step: Substitute 3 for y in x=−5y+15:

x=−5y+15

x=(−5)(3)+15

x=0(Simplify both sides of the equation)

Therefore (0,3) which is one solution

You might be interested in
I need help with number 1
Ivan
The answer you have is good. You don't need to change anything.
3 0
3 years ago
The basketball team has 48 minutes to win a game. They are on offense 18
lbvjy [14]

Answer:

12 times

Step-by-step explanation:

6 0
3 years ago
Mark makes $60 for every six hour shift he works. How much will he make if he works an eight hour shift
Illusion [34]

Answer:

Mark will make $80 if he works an eight-hour shift.

Step-by-step explanation:

For every six hour shift he works, Mark makes $60

This implies that for every hour, he makes $10 ($60/6)

Therefore, for working an eight-hour shift, Mark will make $80 ($10 * 8) or ($60/6 * 8).

We can conclude that Mark's employer pays him $10 per hour.

This hourly rate can be used to work out how much Mark will earn if he works for a month or a year, as the case may be.

7 0
2 years ago
Los jornales de dos obreros suman S/.60. Si uno de ellos gana S/.12
8_murik_8 [283]

Answer:

Cada uno de ellos gana:

S/. 24

S/. 36

Step-by-step explanation:

Planteamiento:

a + b = 60

a = 12 + b

Desarrollo:

sustituyendo el valor de la segunda ecuación del planteamiento en la primer ecuación del planteamiento:

(12+b) + b = 60

2b + 12 = 60

2b = 60 - 12

2b = 48

b = 48/2

b = 24

de la segunda ecuación del planteamiento:

a = 12 + b

a = 12 + 24

a = 36

Check:

24 + 36 = 60

5 0
3 years ago
If 1/2 gallon of paint covers 1/8 of a wall, then how many quarts of paint are needed for the entire wall?
romanna [79]

Answer:

4 gallons

Step-by-step explanation:

The total required quarts of paint is: 8 x 1/2 = 4

6 0
3 years ago
Read 2 more answers
Other questions:
  • What is 11+5+3x2+8x1
    10·2 answers
  • Help with question 17!
    7·1 answer
  • NASA performed aerodynamic and acoustic tests of two and three-dimensional airfoil blade sections. These tests were conducted in
    11·1 answer
  • On MOnday the escalator was not working. It took Tom 18 seconds to reach the top, climbing two steps each second. By Tuesday the
    14·1 answer
  • Multiply and simplify .<br> b^4•b•b^2•b^3<br> B^9<br> 4b^9<br> B^10<br> B^24
    7·1 answer
  • Mrs Smith has 12 times as many markers as color pencils the total number of markers and colored pencils is 78 how many markers d
    9·1 answer
  • The front of an a-frame house is in the shape of a triangle.The height of the house is 20 feet.The area of the front of the a-fr
    6·1 answer
  • What is the complete factorization ?
    14·1 answer
  • help!!!! I'm going to be doing quick questions. you answer them, you get a brainly. Starting with this one!!!!!!!! I think it's
    5·1 answer
  • The value of cosine is undefined at pi and 2pi radians.<br> TRUE<br> FALSE
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!