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
Kazeer [188]
2 years ago
5

14.What is the solution of the system?

Mathematics
1 answer:
Archy [21]2 years ago
3 0

Answer:

14.  x=-2.5,  y = -7

15.  x=28  y = -20

Step-by-step explanation:

14.  Let's solve this system by elimination.  Multiply the first equation by -1.

-1*(4x-y)= -1*(- 3)

-4x +y = 3

Then add this to the second equation.

-4x+y = 3

6x-y= - 8

--------------

2x   = -5


Divide each side by 2

x = -2.5

We still need to find y

-4x+y =3

-4(-2.5) + y =3

10 +y =3

Subtract 10 from each side.

y = 3-10

y = -7


15.I will again use elimination to solve this system, because using substitution will give me fractions which are harder to work with.   I will elimiate the y variable.  Multiply the first equation by 11

11( 5x+6y)= 11*20

55x+66y = 220

Multiply the second equation by -6

-6(9x+11y)=32*(-6)

-54x-66y = -192


Add the modified equations together.

55x+66y = 220

-54x-66y = -192

---------------------------

x = 28

We still need to solve for y

5x+6y = 20

5*28 + 6y =20

140 + 6y = 20

Subtract 140 from each side

6y = -120

Divide by 6

y = -20

You might be interested in
Clara and Toby are telemarketers.
Korolek [52]

Answer:

Toby will reach more people in 40 phone calls

3 0
2 years ago
A survey asks adults to report their marital status. Suppose that in the city which the survey is conducted, 51% of adults are m
saul85 [17]

Answer: they all are different

Step-by-step explanation:

6 0
2 years ago
1.2 ÷ 4 = 12 tenths ÷ 4
Harlamova29_29 [7]

Answer:

Yes you're right, it does

3 0
3 years ago
If he jogs at a constant speed of 9km/h, tell me how far kurt jogs each day. On which day did he jog the furthest?
umka21 [38]

Answer:

It is the same speed everyday

Step-by-step explanation:

It is a constant speed

3 0
2 years ago
3 packs of soda cost $10 less than 5 packs of soda. Write and equation that models this, and solve.
zysi [14]
<span>Cost 1 pack = x
3x + 10 = 5x
2x = 10
x = 5
1 pack cost $5
Hope this helped</span>
8 0
3 years ago
Other questions:
  • Simplify the square root of -16 + the square root of -9
    9·1 answer
  • A normal probability/quantile plot is used to see if the distribution of a quantitative variable follows a __________ distributi
    6·1 answer
  • Multiple Choice: Please select the best answer
    14·1 answer
  • 2x
    12·1 answer
  • Which are correct representations of the inequality 6x2 3 + 4(2x - 1)?
    14·1 answer
  • Help a girl out please :)
    11·2 answers
  • X/5+2 = -1<br> Solve 2-step equations
    6·2 answers
  • PLEASE HELP 7TH GRADE MATH
    14·1 answer
  • Leroi and Sylvia both put $100 in a savings account. Leroi decides he will put in an additional $10 each week. Sylvia decides to
    10·2 answers
  • Can someone please help me
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!