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
JulijaS [17]
3 years ago
15

Solve the system of equations.

Mathematics
1 answer:
Slav-nsk [51]3 years ago
8 0
13x - 6y = 2......multiply by 2
3x - 4y = -10....multiply by -3
------------------
26x - 12y = 4 (result of multiplying by 2)
-9x + 12y = 30 (result of multiplying by -3)
-----------------add
17x = 34
x = 34/17
x = 2

now sub 2 in for x into either of the original equations to find y
3x - 4y = -10
3(2) - 4y = -10
6 - 4y = -10
6 + 10 = 4y
16 = 4y
16/4 = y
4 = y

solution is (2,4)
You might be interested in
Determine the equation of the inverse of y = 7x + 2
Eddi Din [679]
Since we are finding the inverse you switch the variable. So it is now x=7y+2 and now you solve for y. You would get x-2/7 = y for the inverse
8 0
3 years ago
Find the mode of the following data:
Dafna1 [17]
C. 16

To find the mode, you find the highest number in the data set, then you subtract the highest number (21) from the lowest number in the data set (4). So the mode would be 16.
5 0
3 years ago
John & friends brought 4 bags of popcorn and 3 sodas at the movie for a total of 13.50. At the next movie John & friend
scoray [572]

Answer:

The cost of 5 bags of popcorn and 2 sodas is 14.25 units.

Step-by-step explanation:

We are given the following in the question:

Let x units be the cost of a popcorn bag and y units be cost of soda.

The cost of 4 bags of popcorn and 3 sodas is 13.50.

Thus, we can write the equation:

4x + 3y = 13.50

The cost of 2 bags of popcorn and 5 sodas is 12.00

Thus, we can write the equation:

2x+5y=12

Solving the two equations, we get,

4x + 3y-(4x+10y) = 13.5 - 24\\\Rightarrow -7y  =10.5\\\Rightarrow y = 1.5\\\Rightarrow 2x + 5(1.5) = 12\\\Rightarrow x = 2.25

Thus, the cost of popcorn bag is 2.25 units and the cost of a soda is 1.5 units.

Cost of  5 bags and 2 sodas

==5x+2y\\=5(2.25) + 2(1.5)\\=14.25

Thus, cost of 5 bags of popcorn and 2 sodas is 14.25 units.

8 0
3 years ago
if everything in a store is 20% off and the discounted price of an item is $18.00 what is the regular price?
EastWind [94]

Answer:

14.4 dollars

Step-by-step explanation:

If you buy an item at $18 dollars with a 20% discount, you will pay 18 - 3.6 = 14.4 dollars

8 0
3 years ago
hello can plzz help me with this question wil mark u brainlest and its for 18 points the file is down below thank u :)
Hoochie [10]

Answer:

a rectangular prism

Step-by-step explanation:

consists of 6 faces which are rectangles

8 0
3 years ago
Read 2 more answers
Other questions:
  • a payday loan store charges $40 for one month loan of $300. what annual interest rate is This equivalent to
    5·1 answer
  • 4. In ABC, AB = 8,BC = 10, and AC = 7
    8·1 answer
  • A car is traveling at 48 miles per hour. What is the speed of the car in centimeters per second? (1 mile = 5,280 feet, 1 foot =
    11·2 answers
  • Do y’all the answer?
    12·1 answer
  • Please answer the attachment for me. The answer that is circled is wrong.
    6·1 answer
  • Solve for s 2* s= 1.2 what is it​
    12·2 answers
  • Help Please 18 points and Brainliest!!
    10·1 answer
  • Observa las siguientes imágenes formadas por círculos:
    5·1 answer
  • Ryan and Sheila are preparing to get married. Sheila has a car payment of $297.00 per month, which is 9% of her monthly income.
    12·1 answer
  • I will give brainliest to whoever answers this question correctly.
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!