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
Jobisdone [24]
3 years ago
15

Solve each system using elimination.

Mathematics
2 answers:
Tema [17]3 years ago
5 0
Https://www.mathpapa.com/algebra-calculator.html
Sorry i cant answer im in a hurry! BUT ITS A GREAT ALGEBRA CALCULATOR!
Artyom0805 [142]3 years ago
5 0
A) 3x + 3y = 27 ----- (1) 
 x - 3y = -11-------(2)
 Multiplying (2) by 3 we have 3x - 9y = -33 ----(3)
 Subtracting (3) from (1) we have 
 -9y - 3y = -33 - 27
 So y = 5. Substituting value of y into (1) we have 3x + 3(5) = 27. So x = 27 -
15/ 3 = 4.
 B) Also 2x + 4y= 22 ----(1)
  2x - 2y= -8 -----(2)
 Subtracting (2) from (1) we have 
 -2y - 4y = -8 - 22 = -30
 -6y = - 30. Hence y = 5. Substituting into (1) we have 2x + 4(5) = 22. X = 22 - 20/2 = 1
 C) 5x - y = 0 -------(1)
  3x + y = 24 ------(2)
 Adding (2) to (1) we have 
 3x + 5x = 24. X = 24/8 = 3. So y = 5(3) - y = 0. y = 15
You might be interested in
A piece of string is 325 centimeters long. you need the string to be 1.1/4meters long. how many centimeters should you cut off?
sveticcg [70]
You have to cut off 200 centimeters.  1.25 meters is 125 centimeters so 325-125=200.
8 0
3 years ago
Lorenzo’s test scores are 90, 83, 88, 74, 68, and 80. If the teacher drops the lowest test score before calculating the mean, wh
madam [21]
To find the mean, add all the values and then divide the sum by how many values you added. In this case, if the teacher drops the lowest score (68) that would leave 5 values. So,

90 + 83 + 88 + 74 + 80 = 415 < this is the total of all (minus the lowest) or Lorenzo's test scores. Now take this number, and divide it by 5 (because we added five tests together):

415 / 5 = 83 < this is the new mean, and also his percentage grade. 

Answer: 83

Alternatively, you can list the grades from least to greatest, and cancel one value from each side until you get to the middle. 
8 0
3 years ago
One positive number is 5 times another number. The difference between the two is 1480.
Stella [2.4K]

Hey there!

Let's create a systems of equations with x and y to find our numbers.

x=5y

x-y=1480

Let's plug our x value into the second equation.

5y=y=1480

4y=1480

y=370

Now we multiply this number by five as the first equation says to get our x.

x=1850

Our numbers are 1850 and 370.

I hope this helps!

4 0
3 years ago
Help with 4 pls thx
m_a_m_a [10]
The answer is a. Because at approximately 17 weeks the two lines meet.
7 0
3 years ago
Read 2 more answers
What expression can be used to determine the total cost of buying c pounds of cashews for $3.85
Anna [14]

Answer:

B

Step-by-step explanation:

8 0
3 years ago
Other questions:
  • What does the expression l+w+l+w represent
    13·2 answers
  • (x-1/x ²-4) + (1/x-2)
    10·1 answer
  • What is the LCM of 4?
    10·1 answer
  • PLEASE IT IS URGENT I AM BEING TIMED HELP HELP
    12·1 answer
  • A recipe requires 1/3 cup of milk for each 1/4 cup of water. How many cups of milk per cups of water are there?
    9·1 answer
  • Consider the sequence given by the formula a(n + 1) = 5a(n) and a(1) = 2 for n ≥ 1.
    10·1 answer
  • Which expression is equivalent to 6(3x-4)
    8·1 answer
  • Professor Melendez has 10 students in her college
    10·1 answer
  • Find the domain of this equation {-2
    10·1 answer
  • 4. Courtney wants to sell her grandfather's antique 1932 Ford. She begins to set her price by looking at ads and finds these pri
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!