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
Mkey [24]
3 years ago
14

Please help I need practice on this but I don't understand this concept, so please explain your answer. I really want to underst

and but my teacher didn't explain it clearly. I will mark brainliest for the best answer, with an explanation. Please don't put a link or type in a random answer. I really legitimately need help. Thanks to anyone who gives an answer. :D - Luna
Solve using elimination.

–3x + y = 15
–3x + 7y = –3

(_,_)
Mathematics
2 answers:
love history [14]3 years ago
7 0

Answer:

x=-6 and y=-3

mrk me brainliest plz

Step-by-step explanation:

Step: Solve−3x+y=15 for y:

−3x+y=15

−3x+y+3x=15+3x (Add 3x to both sides)

y=3x+15

Substitute 3x+15 for y in−3x+7y=−3:

−3x+7y=−3

−3x+7(3x+15)=−3

18x+105=−3(Simplify both sides of the equation)

18x+105+−105=−3+−105 (Add -105 to both sides)

18x=−108 divide both side by 18

x=-6

Arturiano [62]3 years ago
7 0

Answer:

(-4 + 3)

Step-by-step explanation:

–3x + y = 15

(-1) –3x + 7y = –3

–3x + y = 15

+ 3x - 7y = 3

6y = 18

/6     /6

y = 3

–3x + 3 = 15

      - 3    -3

-3x = 12

/-3    /-3

x = -4

You might be interested in
A TV has a listed price of $695.95 before tax. If the sales tax rate is 7.75%, find the total cost of the TV with sales tax incl
vivado [14]

Answer:

7.75%/100×695.95=53.93

695.95+53.93=749.88

answer:749.90

6 0
3 years ago
An aircraft travels for 30 minutes at an average speed of 37 mph. how far did the airplane travel?
kupik [55]

Answer:

1.23 repeating

Step-by-step explanation:

divide 37 and 30

7 0
2 years ago
For each of the described curves, decide if the curve would be more easily given by a polar equation or a Cartesian equation. Th
Reptile [31]

Answer:

  (a)  (x-2)^2 +(y-2)^2 = 16

  (b)  r = 2

Step-by-step explanation:

(a) When the circle is offset from the origin, the equation for the radius gets messy. In general, it will be the root of a quadratic equation in sine and cosine, not easily simplified. The Cartesian equation is easier to write.

  Circle centered at (h, k) with radius r:

  (x -h)^2 +(y -k)^2 = r^2

The given circle is ...

  (x -2)^2 +(y -2)^2 = 16

__

(b) When the circle is centered at the origin, the radius is a constant. The desired circle is most easily written in polar coordinates:

  r = 2

6 0
3 years ago
write and solve an addition equation to find Huntley's Creek earnings if the total monthly earnings for all the stores is $354,3
Alja [10]

Answer:

Step-by-step explanation:

5 0
3 years ago
-<br>nun<br>THE SUM OF THREE TIMES A<br>Numbers and 11​
Vikentia [17]

Answer:

3x + 11

Step-by-step explanation:

Remember BPEMDAS.

"Three times a number" is saying multiply 3 times a variable; in this case, <em>x</em>. So we have 3x

"The sun of 3x and 11" is saying add our 3x and 11, so: 3x + 11

8 0
3 years ago
Other questions:
  • Identify the type of data​ (qualitative/quantitative) and the level of measurement for the data described below. Explain your ch
    6·1 answer
  • Help please asap!! will mark brainliest!!!!! its timed
    10·2 answers
  • What is the solution to the following equation?
    8·2 answers
  • Write the equation of the circle with center (2, 1) and (5, 2) a point on the circle
    13·1 answer
  • give an example of parallel lines in the real world. then describe how you could prove that lines are parallel.
    8·1 answer
  • Help me please-1 = (5 + x)/6
    8·2 answers
  • A computer company will sell its new tablet
    14·1 answer
  • A ferris wheel has a radius of 50 feet, how many feet would it take to go around the entire ferris wheel (the circumference)?
    10·2 answers
  • Solve for y in terms of x.<br> 3x = 2y-18<br><br> Answers??
    12·2 answers
  • Identify the postulate (SAS, ASA, SSS) / theorem (AAS) that proves the two triangles are congruent.​
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!