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
seropon [69]
3 years ago
12

2X + 5y = -13 3x - 4y = -8

Mathematics
1 answer:
almond37 [142]3 years ago
3 0
Answer:

You will need to use simultaneous equations.

Method:

First we need to make one set of variable the same, in this case we will:

-Multiply the top equation by 3 to get 6x
-Multiply the bottom equation by 2 to get 6x

The result will be as follows:

1) 2x+5y=-13 x3
1) 6x+15y=-39

2) 3x-4y=-8 x2
2) 6x-8y=-16

Now we will make both equations equal to 6x:

1) 6x=-15y-39
2) 6x=8y-16

Now because they both equal 6x, they therefore equal each other:

-15y-39=8y-16
-23=23y
y=-1

Now that we have y, we can substitute it back into one of the equations to get x:

1) 2x+5(-1)=-13
2x-5=-13
2x=-8
x=-4
You might be interested in
Evaluate the following expression. You should do this problem without a
madam [21]

Answer:ln is called the natural log, or log to the base e. ln can also be written as

So, we can write the given expression as

The property of logs is:

This mean if the number a is raised to log whose base is the same as the number a itself, then the answer will be equal to the argument of the log which is x.

In the given case, the number e and the base of log are the same. So the answer of the expression will be the argument of log which is 6.

so, we can write

Thus, the correct answer is option D

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
Help me with this question please
sp2606 [1]
We add 548 and 225 which would be 773
7 0
3 years ago
A line has no thickness, but it does have direction and ___ length.<br> (Fill in the blank)
Mandarinka [93]

A line has no thickness, but it does have direction and infinite length.

A line has length but no width, making it a one-dimensional figure. A line is made up of a collection of points that can be stretched indefinitely in opposing directions.

Given the variety of geometries in modern mathematics, the idea of a line is directly related to how the geometry is described. For instance, a line in the plane is frequently defined in analytic geometry as the collection of points whose coordinates satisfy a given linear equation, but in a more abstract context, such as incidence geometry, a line may be an independent object, distinct from the collection of points that lie on it.

In cartesian plane the general equation of a line is given by :

y=mx+c where the slope is denoted by m and the y-intercept by c.

To learn more about a straight line:

brainly.com/question/17188072

#SPJ9

3 0
2 years ago
Given the following functions f(x) and g(x), solve (f+g)(3) and select the correct answer bellow f(x)=6x+3. G(x)=x-7
Likurg_2 [28]

Answer:

17

Step-by-step explanation:

I would just solve them individually for 3 and then add them together. f(x)=6(3)+3 = 21 and g(x)= 3-7= -4

(f+g)(3) = 21-4= 17

5 0
3 years ago
You get a 5% commission. You base your monthly salary on $100000 in sales. What is your monthly salary.​
Natali [406]

Answer:

100/100'000*5 = 5000 + base commission of 100'000 = 105'000

Step-by-step explanation:

3 0
3 years ago
Other questions:
  • Brass is an alloy created using 80% copper and 20% zinc. If Henri's brass trumpet contains 48 ounces of copper, how many ounces
    6·1 answer
  • The ______ property of equality stated that if you divide both side by an equation by the same non cero number , the two sides w
    8·1 answer
  • What is the theoretical probability that Marco will choose a card with a heart on it?
    12·1 answer
  • The school had 366 chairs and 12 classrooms. How many chairs could they put in each classroom?
    5·1 answer
  • Which type of transformation creates a similar but NOT congruent shape. A. reflection B. translation C. dilation D. rotation
    15·1 answer
  • 100 POINTS FOR WHO EVER SHOWS THE WORKS AND ANSWERS CORRECTLY. LEGIT 4 QUETIONS BUT MUST SHOW WORK!!
    8·2 answers
  • 4/18 reduced too the lowest terms if possible
    5·2 answers
  • Sasha and Mona practiced swimming every day. They increased the number of minutes of swimming every week as described below: Sas
    5·1 answer
  • Please help, I only have 30 minutes left...
    7·2 answers
  • Help me solve 5 ½ % of 60
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!