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
Lana71 [14]
2 years ago
8

Solve the system of equations 2x-y=132x−y=13 and 6x+5y=-336x+5y=−33 by combining the equations.

Mathematics
1 answer:
andreyandreev [35.5K]2 years ago
5 0

Answer: (2;-9).

Step-by-step explanation:

\left \{ {{2x-y=13\ |*(-3)} \atop {6x+5y=-33}} \right. \ \ \ \ \left \{ {{-6x+3y=-39} \atop {6x+5y=-33}} \right. .\\Summing\  up\  these\  equations:\\8y=-72\ |:8\\y=-9.\\2x-(-9)=13\\2x+9=13\\2x=4\ |:2\\x=2.

You might be interested in
Isaac shoveled 9 of his neighbors' driveways after a snow storm. He charged $25 for a short driveway and $45 for a long driveway
e-lub [12.9K]

Answer:

y($) =  405- 20x

Step-by-step explanation:

Number of short driveways = x

Number of long driveways = 9-x

Fee per long driveway = $45

Fee per short driveway= $25

Total amount = y

y ($) =  25x + 45 (9-x)

      =  25x  + 405 -45x

      = 405- 20x

5 0
3 years ago
If f(x) = 2x - 9, which of the following are correct? Select all that apply. f(-1) = -11 f(2) = 5 f(3) = -3 f(0) = -9 f(-3) = 15
Yuri [45]

f(-1) = -11 and f(3) = -3 . these functions are true .

What does a math function mean?

  • A relationship between a group of inputs and one output each is referred to as a function.
  •  A function is an association between inputs in which each input is connected to precisely one output.
  • A domain, codomain, or range exists for every function. f(x), where x is the input, is a common way to refer to a function.
  • In mathematics, a function is an expression, rule, or law that establishes the relationship between two variables (the dependent variable).

given function  f(x) = 2x - 9

   f(-1) = -11 ⇒ x = -1 put in function

                       f( -1 ) = 2 * -1 - 9  ⇒ - 11

    f(2) = 5   ⇒ x = 2 put in function

                    f( 2 ) = 2 * 5 - 9 = 1

    f(3) = -3  ⇒  x = 3 put in function

                     f ( 3 ) = 2 * 3 - 9 = -3

       f(-3) = 15   ⇒  x =  -3 put in function

                     f( -3) = 2 * -3 - 9 = - 15

Learn more about function

brainly.com/question/21145944

#SPJ13

3 0
1 year ago
Carys calculates the total amount E, in dollars, that she earns for working h hh hours using the equation E=10h. How many dollar
Monica [59]

if an hour is able to be split up for payment then it will be 1/10 of an hour

6 0
3 years ago
Read 2 more answers
The number of milligrams of a certain medicine a veterinarian gives to a dog varies directly with the weight of the dog. If the
sineoko [7]
W/6=d

Because 30 is 6 times 5
4 0
3 years ago
What is the area of the shape
Vera_Pavlovna [14]
To find the  area of a rhombus, the formula is d1(d2)/2
d1 is 4+4 or 8
d2 is 7+10 or 17
17(8)=136
136/2=68
8 0
3 years ago
Other questions:
  • In the diagram shown, line m is parallel to line n . Justine says that ∠3 ∠ 3 and ∠7 ∠ 7 are supplementary angles. Is she correc
    9·1 answer
  • Which of the following is not a type of nonfiction?
    11·2 answers
  • Which equation is an identity?
    8·1 answer
  • There is a picture attached *try to show work*
    14·2 answers
  • Paula received a paycheck of $585. This amount reflects her weekly earnings less 10% of her earnings for deductions. How much wa
    6·1 answer
  • What is the value of the underlined digit 5,678.321 Value of 8
    12·2 answers
  • What is the volume of the cube below? <br> A. 16x^2 <br> B. 4x^2 <br> C. 4x <br> D. 16
    12·2 answers
  • Assume you’ve arrived at this solution: (4x^2 + 8x + 15) + (x^2 − x − 27) − (x^2 − 2x − 35) Going from left to right, what will
    12·1 answer
  • There are 88 marbles in a bin and 50 percent of the marbles are red how many red marbles are in the bin ?
    6·2 answers
  • Find the first, second, and third quartiles for the ages of the 11 most powerful women using the data set listed.
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!