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
WARRIOR [948]
2 years ago
7

X-2y=8 4x+y=5 Solve linear systems by Multiplying

Mathematics
1 answer:
Lisa [10]2 years ago
4 0
<h2> x = 2 and y = - 3</h2>

Step-by-step explanation:

The given system of linear equations:

x - 2y = 8                        ........ (1)

and 4x + y = 5               ........ (2)

To find, the values of x and y = ?

Multiplying equation (2) by 2, we get

2(4x + y) = 5 × 2  

⇒ 8x + 2y = 10                ........ (3)

Adding equations (1) and (3), we get

x - 2y + (8x + 2y) = 8  + 10  

⇒ x - 2y + 8x + 2y = 8  + 10

⇒ 9x = 18

⇒ x = 2

Put x = 2 in (1), we get

2 - 2y = 8        

⇒ 2y =2 - 8

⇒ 2y = - 6

⇒ y = - 3

∴  x = 2 and y = - 3

You might be interested in
Solve for t. 4=2+2/5t
maxonik [38]
T=5

4=2+2/5t
Subtract 2 from both sides.
2=2/5t
Multiply both sides by 5/2.
t=5
8 0
2 years ago
Read 2 more answers
Math item stem image<br> does this figure have symmetry
bearhunter [10]

Answer: yes

Step-by-step explanation:

3 0
2 years ago
The business college computing center wants to determine the proportion of business students who have personal computers (PC's)
Anastasy [175]

Answer:

Option A) reject null hypothesis if z is greater than 1.645

Step-by-step explanation:

We are given the following in the question:

Sample size, n = 250

p = 30% = 0.3

Alpha, α = 0.05

Number of women belonging to union , x = 75

First, we design the null and the alternate hypothesis  

H_{0}: p = 0.3\\H_A: p > 0.3

This is a one-tailed(right) test.

Rejection Region:

z_{critical} \text{ at 0.05 level of significance } = 1.645

So, the rejection region will be

z > 1.64

That is we will reject the null hypothesis if the calculated z-statistic is greater than 1.645

Option A) reject null hypothesis if z is greater than 1.645

6 0
3 years ago
3 yards of ribbon can be purchased for $10. How many yards can $5 purchase.
Stells [14]

Answer:

1.5 yards

Step-by-step explanation:

5 is half of 10

half of 3 is 1.5

I hope this helped and if it did I would appreciate it if you marked me Brainliest. Thank you and have a nice day!

6 0
2 years ago
A square has an area of 100cm^2.What is the perimeter of the square?​
Goryan [66]

Answer:

40 cm

Step-by-step explanation:

Perimeter of a square = 4a

=4 ( 10 )

=40cm

Have a nice day!

3 0
2 years ago
Other questions:
  • Given the line below.
    6·1 answer
  • Joan went to the bookstore. At
    14·1 answer
  • Can you please explain this problem for me <br>2 (-3+4)-3 (6÷-2)​
    10·1 answer
  • You throw a die twice. What is the probability of throwing a number less than four and then a six?
    15·1 answer
  • An adult turtle weighed 4 1/3 ounces how much would 2 adult turtles weigh
    8·1 answer
  • PLEASE HELP! WILL MARK BRAINLIEST IF RIGHT AND 100 POINTS! THREE QUESTIONS!
    15·1 answer
  • The area of a garden is 8 3/4 square yards. If the lenght is 1 1/4 yards , what is the length?​
    5·1 answer
  • Someone help me please !
    11·1 answer
  • Adam plans to choose a video game from a section of the store where everything is
    12·1 answer
  • Luke’s has seven coins. He can make 11p with two of his coins. He can make 11p with three of his coins. He can make 11p with fou
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!