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
Charra [1.4K]
3 years ago
9

Solve the systems by elimination: 8x-2y= -10 -4x+y= 5

Mathematics
1 answer:
Pachacha [2.7K]3 years ago
4 0

Let's eliminate x.  To achieve this, mult. the 2nd equation by 2, obtaining

-8x + 2y = 10.  Now add this result to the first equation:

8x-2y= -10

-8x + 2y = 10

---------------------

        0

The two equations actually represent the same line.   Without an x- or a y-value, we cannot solve for the value of the other variable.  There are infinitely many solutions.

--------------------



You might be interested in
Rewrite this expression in simplest form.<br> (40&amp;w)(-2003)2
AnnyKZ [126]

Step-by-step explanation:

telling you later please wait

7 0
2 years ago
Bob earns $2900 per month. 15% of his salary is deducted for his car loan. Which operation do I use?
spayn [35]

Answer:

Results are below.

Step-by-step explanation:

Giving the following information:

Bob earns $2900 per month. 15% of his salary is deducted for his car loan.

F<u>irst, we need to calculate the deduction for the car:</u>

Deduction= 2,900*0.15

Deduction= $435

<u>Now, the monthly salary that remains for Bob:</u>

Montlhy salary= 2,900 - 435

Monthly salary= $2,465

6 0
2 years ago
Evaluate the expression when x = 3 and y = 5 6y/x
kondaur [170]
If x=3 and y=5 then you just substitute.
6(5)/3
30/3
=10
10 is your answer.
5 0
3 years ago
Read 2 more answers
I need help solving this problem
Olin [163]
3/5 is the correct answer for sin s
8 0
2 years ago
A cube with 40-cm-long sides is sitting on the bottom of an aquarium in which the water is one meter deep. (Round your answers t
Molodets [167]

Answer:

940.8 N

1254.4 N

Step-by-step explanation:

I would think the questions would be to calculate the forces at the top of the cube and at the sides. Thus:

On the top:

F = pressure * area

P = density * gravity * height

the height would be:

1m - 0.4m = 0.6m

replacing:

P = 1000 * 9.8 * 0.6 = 5880

A = (0.4) ^ 2 = 0.16

F = 5880 * 0.16

F = 940.8 N

On the sides:

dF = d * g * h * dA

dA = 0.4 * dh replacing

dF = 1000 * 9.8 * h * 0.4 * dh

dF = 3920 * h * dh

We integrate both sides and we have:

F = 3920 * (h ^ 2/2), h = 0.6 up to h = 1

F = (3920/2) * (1 ^ 2 - 0.6 ^ 2)

F = 1254.4 N

3 0
3 years ago
Other questions:
  • 79-81 thank you so much!!
    6·1 answer
  • Perbandingan kelereng Faiz dan Bayu 4 : 11. Jumlah kelereng mereka 60 buah. Selisih kelereng keduanya adalah
    14·1 answer
  • Point a is at (-7,-9) and point b is at (6,3) what is the midpoint of line segment AB
    6·1 answer
  • Solve: 6x - 8 -2x = -16 *<br> 1 point<br> x = 2<br> x = 1<br> x = -2<br> x = -1
    7·2 answers
  • A middle school needs buses to
    12·2 answers
  • Determine the prime number between 150 and 200​
    11·1 answer
  • Which number line shows Point A at −2, Point B at 3.5, Point C at − 3 and 1 over 2 , and point D, which is the opposite of point
    12·1 answer
  • -5 minus a negative -16 (easy points lol)
    14·1 answer
  • The Celluloid Cinema sold 150 tickets to a movie. Some of these were child tickets and the rest were adult tickets. A child tick
    12·1 answer
  • Simplify<br> 23 + 4.8<br> Plz help
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!