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
Cloud [144]
3 years ago
9

Solve 3x – ly= 11 and -2x – 4y=-26 by elimination

Mathematics
1 answer:
Ede4ka [16]3 years ago
7 0

Answer:

(5, 4 )

Step-by-step explanation:

Given the 2 equations

3x - y = 11 → (1)

- 2x - 4y = - 26 → (2)

Multiplying (1) by - 4 and adding to (2) will eliminate the y- term

- 12x + 4y = - 44 → (3)

Add (2) and (3) term by term to eliminate y

- 14x + 0 = - 70

- 14x = - 70 ( divide both sides by - 14 )

x = 5

Substitute x = 5 into either of the 2 equations and solve for y

Substituting into (1)

3(5) - y = 11

15 - y = 11 ( subtract 15 from both sides )

- y = - 4 ( multiply both sides by - 1 )

y = 4

solution is (5, 4 )

You might be interested in
Help please thank you
avanturin [10]

Answer:

150*2/3=100

take school size then multiply it by the ratio to get the amount of student who prefer such toothpaste.

Step-by-step explanation:

4 0
2 years ago
Which of the following lines is parallel to the line that passes through (−1, −3) and (5, 0)?
AlexFokin [52]

Answer:

depends on the options

Step-by-step explanation:

a parallel line would be y = 1/2x + b, where b is any number

4 0
2 years ago
Some friends shared 2 bags of chips. If each person got 2/3 of a bag of chips, how many friends were there?
quester [9]

Answer:

1 1/3

Step-by-step explanation:

5 0
3 years ago
Ricardo took the following steps to simplify the expression below but was surprised to hear that his answer was incorrect. Which
Xelga [282]

You have not given us any of the steps that Ricardo took to simplify the
expression, and you also haven't given us the list of choices that includes
the description of his mistake, so you're batting O for two so far. 
Other than those minor details, the question is intriguing, and it certainly
draws me in.

If Ricardo made a mistake in simplifying that expression, I'm going to say that
it was most likely in the process of removing the parentheses in the middle. 

Now you understand that this is all guess-work, because of all the stuff that you
left out when you copied the question, but I think he probably forgot that the  3x 
operates on everything inside the parentheses.

He probably wrote that  3x (x-3)  is

either    3x² - 3
     or       x - 9x .

In reality, when properly simplified,

       3x (x - 3)  =  3x² - 9x .


3 0
3 years ago
Which exponential function is represented by the graph?
Anna [14]

Answer:

Step-by-step explanation:

Let's solve this using our formula for exponential functions:

y=a(b)^x where a is the initial value and b is the growth/decay rate. We will fill that equation in with 2 of the coordinates on the graph and come up with the values for both a and b. (0, 3) and (1, 6):

3=a(b)^0. Anything raised to the power of 0 is 1, so that means that

a = 3. We will use that value along with the x and y from the second coordinate to solve for b:

6=3(b)^1. b to the first is just b, so our equation is

6 = 3b and

b = 2.

Our equation then is

y=3(2)^x, the third choice down.

8 0
3 years ago
Other questions:
  • Given f (x) = 8x + 4<br> find f (6)
    13·2 answers
  • Would this be correct? I have to write it as a single power.
    5·1 answer
  • There are 10,000 mutual fund managers. 22 claim that they are the best, since their fund beat the relevant index every year for
    15·1 answer
  • Three equivalent forms of a quadratic function are given. Select the form which reveals the zeros of f(x) without needing to alt
    12·1 answer
  • What is the value of the slope of a line with the equation: 20-5x?
    5·1 answer
  • Between the years of 1947 and 1956, earthenware jars containing what are known as the Dead Sea Scrolls were found in caves along
    10·1 answer
  • Representations of decimals
    8·2 answers
  • What i 5 + 5<br> ok<br> ok<br> ko
    9·2 answers
  • What is the explicit formula of the arithmetic sequence?<br> -9, -6, -3, 0....
    12·1 answer
  • The radius of a spherical balloon a is increasing at a constant rate of 0.1 cm/s. another balloon, b, is being continuously defl
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!