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
Vladimir [108]
3 years ago
9

If 2x + y = 23 and 4x – y = 19; find the value of x – 3y and 5y – 2x

Mathematics
1 answer:
Diano4ka-milaya [45]3 years ago
3 0

Answer:

- 20 and 31

Step-by-step explanation:

Solve the given equations simultaneously to find x and y

2x + y = 23 → (1)

4x - y = 19 → (2)

Adding the 2 equations term by term will eliminate y

6x + 0 = 42

6x = 42 ( divide both sides by 6 )

x = 7

Substitute x = 7 into either of the 2 equations and solve for y

Substituting into (1)

2(7) + y = 23

14 + y = 23 ( subtract 14 from both sides )

y = 9

Then

x - 3y = 7 - 3(9) = 7 - 27 = - 20

5y - 2x = 5(9) - 2(7) = 45 - 14 = 31

You might be interested in
The cosine function reaches a value of 0 when x is equal to
ollegr [7]

Answer:

Step-by-step explanation:

The values ​​of the cosine function are represented by the axis OX of the goniometric circumference (circumference centered at the origin and of radius 1). Therefore the cosine is zero for the 90º and 270º angles.

4 0
3 years ago
How far will a jet travel in 2 hours and 30 minutes if its average speed is 450 miles per hour?
Nezavi [6.7K]
Distance = rate x time

D = 450 mph x 2.5 h
D = 1,125 miles
5 0
4 years ago
Read 2 more answers
Help pizzzz The wheel of a bike has a diameter of 26 inches. What is the circumference of the wheel?
larisa [96]
Your answer would be B: 82 inches


To find the circumference of a circle and only given the diameter, you will simply multiply the diameter by pi (3.14) and that will be your answer. You may have to round. Hope this helps!
4 0
3 years ago
Read 2 more answers
Using the until circle, what is the exact value of tan 2pi/3
Klio2033 [76]
Tan 2 pi/3= (sin2pi/3)/(cos2pi/3)= (sqrt 3)/2 dividend by (-1/2)= - sqrt 3
7 0
3 years ago
Read 2 more answers
I'm begging you! HELP ME
love history [14]
Okay first off. You want to combine like terms. 

2.75-1.5=1.25j 
2.25+3=5.25

Now you just fit those two answers into the final answer and you have:

1.25j+5.25.
7 0
3 years ago
Other questions:
  • what is the capacity of a container that is filled in 35 minutes by a tap that supplies 240 liters per hour​
    8·2 answers
  • You’re given three angle measurements of 30°, 70°, and 80°. How many triangles can you construct using these measurements?
    9·1 answer
  • What is the logarithmic form of the equation e3x ≈ 3247?
    6·1 answer
  • I wanna had 93%, 85% and 75%, but I have no idea how to do it.
    6·1 answer
  • 11/8 Oz as a mixed number
    9·1 answer
  • Applying the Binomial Theorem:
    6·2 answers
  • A rectangular floor of area 360 m2 is going to be tiled. Each tile is rectangular, and has an area of 240 cm2. An exact number o
    9·2 answers
  • What are the solutions to the equation y =<br> 4x2 + 50 – 6?
    12·2 answers
  • Find cd and the area​
    5·2 answers
  • Can somebody solve this
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!