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
Sauron [17]
2 years ago
5

2x + 5y = 8 x - 2y = -5 Simultaneously pleasee

Mathematics
2 answers:
vodka [1.7K]2 years ago
7 0

Answer:

3

Step-by-step explanation:

mario62 [17]2 years ago
3 0

Answer:

(- 1, 2 )

Step-by-step explanation:

2x + 5y = 8 → (1)

x - 2y = - 5 → (2)

multiplying (2) by - 2 and adding to (1) will eliminate x

- 2x + 4y = 10 → (3)

add (1) and (3) term by term to eliminate x

0 + 9y = 18

9y = 18 ( divide both sides by 9 )

y = 2

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

substituting into (1)

2x + 5(2) = 8

2x + 10 = 8 ( subtract 10 from both sides )

2x = - 2 ( divide both sides by 2 )

x = - 1

solution is (- 1, 2 )

You might be interested in
What is the equation of the line that passes through the point (-3,-4) and has a slope of 4?
lozanna [386]
It would be c i think
5 0
3 years ago
A swimming pool is 20 m long 15 m wide and 3 m deep. Find the cost of repairing the
Gnom [1K]

Cost of repairing the pool is

= Rs 12750

Correct me if i'm wrong

3 0
3 years ago
Time to paint the living room. The room measures 20 feet wide by 30 feet long by 12
chubhunter [2.5K]

The cost to paint the walls and the ceiling is $855

<h3></h3><h3>How much will it cost?</h3>

First, we need to find the area that will be painted.

The area of two of the walls is:

A = 20ft*12ft = 240ft²

The area of the other two walls:

A' = 30ft*12ft = 360ft²

The area of the ceiling is:

A'' = 20ft*30ft = 600ft²

We also need to subtract the areas of the two doors and the 4 windows.

Each door is 7ft by 3ft, so the area of each door is:

a = 7ft*3ft = 21ft²

Each window is 4ft by 3ft:

a' = 4ft*3ft = 12ft²

Then the total area that will be painted is:

area = 2A + 2A' + A - 2a - 4a'

area = 2*( 240ft²) + 2*(360ft²) + 600ft² - 2*(21ft²) - 4*(12ft²)

area = 1,710 ft²

We know that we need two coats of paint to cover that area, and the cost per square foot of paint is $0.25, then the total cost is:

C = $0.25*2*(1,710) = $855

The cost to paint the walls and the ceiling is $855

If you want to learn more about areas:

brainly.com/question/24487155

#SPJ1

6 0
2 years ago
6.
Nimfa-mama [501]

Let's call our number <em>x</em>.

So we can setup the equation x² = 100.

To solve this equation, we square root both sides.

So we have x = ±10.

Always use plus or minus when square rooting both sides

of an equation so our answer is not only 10, it's also -10.

5 0
3 years ago
Read 2 more answers
Solve vertex form out <br> О=x^2 -4x -12
pochemuha

Answer:  (2,-16)

Step-by-step explanation: you have to rewrite it by using the vertex form (h,k)

3 0
3 years ago
Other questions:
  • A dog has a leash on that is 4 meters long. What is the total area of the space where the dog can travel?
    13·1 answer
  • A one year membership to a gym costs $725. The registration fee is $125, and the remaining amount is paid monthly. Defibr a vari
    14·2 answers
  • What times what equals -36 and adds up to -5
    10·1 answer
  • the graph of function f is shown. function g is represented in a table. which statement correctly compares the two functions?
    12·1 answer
  • How many solutions does -5x+10x+3=5x+6
    8·1 answer
  • The more you take the more you leve behind​
    11·1 answer
  • Please help me solve!-
    12·1 answer
  • Which expression is equivalent to -5(1+7x)+3(3+4x)
    8·1 answer
  • Alicia will construct a rectangle that has a height of 4 units and an area of up to 48 square units. Which inequality represents
    15·1 answer
  • The first term of a sequence is -5, and the common difference is 10. What are the next three terms?
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!