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]
2 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]2 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
3/10 divided by 4/5 ... Divided then put into simplest form
statuscvo [17]
The operation 3 / 10 ÷ 4/ 5, can also be written as (3 / 10) x (4 / 5). The operation can be done by multiplying the numerators and denominators which is equal to 12 / 50. This may be further simplified as 6/25. 
5 0
3 years ago
Which equations are equivalent to ? Check all that apply. X 4 = 64 60 = x.
hram777 [196]

You can use the fact that equivalent equations are such that one equation can be obtained by performing some operations(which doesn't break equality) on the other equation and vice versa.

The equivalent equation to x + 4 = 64 is x = 60

<h3>What are equivalent equations?</h3>

Equivalent equations are such that one equation can be obtained by performing some operations(which doesn't break equality) on the other equation and vice versa.

<h3>How to get the equivalent equation of the given equation?</h3>

The given equation is

x + 4 = 64

Subtracting 4 from both sides, we get

x + 4 - 4 = 64 - 4\\x = 60

Thus, one equivalent equation to the given equation is x = 60

The equivalent equation to x + 4 = 64 is x = 60

Learn more cases of equivalent equations here:

brainly.com/question/14332869

5 0
2 years ago
A garden hose is 15 yards long. What is the length of the hose in inches?
Thepotemich [5.8K]

Answer:

540 inches

Step-by-step explanation:

1 yard equals 36 inches.  Thus, a 15-yard hose has the measurement in inches of (36)(15) = 540

5 0
2 years ago
Read 2 more answers
What type of association would you expect to see between the amount of fog in the sky and the distance that a pilot can see? *
harkovskaia [24]

Answer:

answer choice D I hope this helped

8 0
3 years ago
enrique earned $101.40 in interest over 6 years in a savings account that pays 1.3 % simple interest per year. how much did Enri
victus00 [196]
Simple interest, I = 101.40
Time, t = 6 years
interest, i = 1.3%

Interest, I=Pit, rearrange
Principal, P=I/(it)=101.40/(6*0.013)=1300
7 0
3 years ago
Other questions:
  • Monique uses a random number generator to simulate the results of a coin
    6·1 answer
  • Solve. 1/2(-4 — 2n) = -17 Please explain it to me if you can I dont really understand how to do these types of problems so it wo
    7·2 answers
  • In a lab, a scientist is growing bacteria for a study. The scientist begins with a bacteria population of b cells. She discovers
    13·2 answers
  • The difference of −2d and −3d is equal to the difference of 1/6 and 1/3
    8·1 answer
  • Rewrite the expression in its simplest form
    9·1 answer
  • The length of a rectangle is 5 inches and the width is x inches. What is the perimeter, in inches?
    15·1 answer
  • There are 950 students at a high school. There are 275 freshmen and 320 sophomores. What is the ratio of freshmen to sophomores
    7·1 answer
  • What is If you had 10 apples after someone ate 3/4 of the apples how much did you have at the start (I had a brainfart and Ik it
    5·1 answer
  • What is the name of the polynomial 7x+1 ?
    15·1 answer
  • Using the frequency table given, find the mean, median, and mode.
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!