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
USPshnik [31]
3 years ago
7

Solve the system of equations and choose the correct answer from the list of options.

Mathematics
2 answers:
earnstyle [38]3 years ago
8 0
X-y=7
y=3x+12
y-3x=12
+
-y+x=7
=
-2x=19
x=-9.5
y=-16.6. Hope it help!
ELEN [110]3 years ago
3 0

Answer: x=-9.5

y=-16.5

Step-by-step explanation:

Hi, to solve this problem we have to apply the substitution method:

x-y =7 (a)

y=3x+12(b)

Replacing the value of "y" in (a) for (b):

x -(3x+12)=7

x-3x-12=7

x-3x =7+12

-2x =19

x=19/-2

x=-9.5

Replacing the value of "x" in (b)

y=3x+12

y=3(-9.5)+12

y= -28.5+12

y=-16.5

Feel free to ask for more if needed or if you did not understand something.

You might be interested in
Which statement is true about the angles in triangle P Q R ( THIS FOR A GRADE & DUE TODAY!)
xz_007 [3.2K]
The first one. The sum of all angles on a triangle is always equal to 180
7 0
4 years ago
Anita says ray CD can also be called ray dc. do you agree?
Verdich [7]

No, Rays go one way only since a point block te other way. Otherwise it wont be a ray :)

3 0
3 years ago
Can someone please write out the decimal 112.001 as a fraction? And it would really really help me a lot if you could explain ho
iragen [17]

So let's leave the 112 aside for now. The question then becomes how to write the decimal 0.001 as a fraction. The key is to remember that

0.x  corresponds to "tenths" so x/10

0.0x corresponds to "hundredths" --> x/100

0.00x corresponds to "thousandths" --> x/1000

The number 0.001 is just 1 thousandth, or 1/1000

Now back to 112.001. You can write it as

112/1 + 1/1000 =

(112,000+1)/1000 =

112,001/1000  (the fraction you were looking for)

Let me know if you have questions

6 0
3 years ago
Alexis sold half of her dolls and then bought six more dolls. She now has twelve dolls how many dolls did Alexis begin with ?
tino4ka555 [31]

Answer:

12

Step-by-step explanation: Because 12 old dolls - 6 dolls = 6 dolls. Then you add 6 old dolls and 6 new dolls and you get 12 old and new dolls. Sorry  if this is confusing. I tried to make it less confusing.

3 0
3 years ago
6 over 25 to decimal
Rudiy27
The answer is 24 over 100 is egual to .24
6 0
3 years ago
Read 2 more answers
Other questions:
  • Describe the axis of symmetry of the graph of the quadratic function represented by the equation y=ax^2+bx+c when b=0
    12·1 answer
  • The table below shows the typical hours worked by employees at a company. A new employee is offered an annual salary of $37,000.
    12·1 answer
  • -6a + 4b + 42b + -27a
    13·1 answer
  • What are the partial products of 42x5?
    13·2 answers
  • What is the vertex in the following function? y = 3(x + 5)^2 − 4
    9·2 answers
  • Suppose that 30% of all students who have to buy a text for a particular course want a new copy (the successes!), whereas the ot
    9·1 answer
  • Please help me on number 2!!
    11·1 answer
  • A hypothesis will be used to test that a population mean equals 7 against the alternative that the population mean does not equa
    13·1 answer
  • A rope of length 2/5 m is cut into 4 equal cords what is the length of each cord?
    14·1 answer
  • Harrison has 80 CDs in his music collection. If 70% of the CDs are country music and 10% are pop, how many CDs are other types o
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!