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
Leno4ka [110]
3 years ago
14

Solve this equation using elimination: 4x-y=8;6x+y=2

Mathematics
1 answer:
fomenos3 years ago
7 0
Solve simultaneously.

4x - y = 8
6x + y = 2


Multiply top equation by 6, and bottom equation by 4, to eliminate x, so that we can find y.
~
24x - 6y = 48
24x - 4y = 8

Subtract top from bottom to form one equation.
~
-2y = 40
Therefore y is 20.

Put y back in to an equation, such as 4x - y = 8.
~
4x - 20 = 8
4x = 28
x = 7
You might be interested in
Prove that 8^6 + 4^11 is divisible by 17
Nimfa-mama [501]
8^6 + 4^11 = 262144 + 4194304 = 4456448
4456448/17 = 262144 is the answer
8 0
3 years ago
(20 POINTS!) Place the circles in order from the circle with the largest area to the circle with the smallest area. 
BigorU [14]

Circumfrance 37.68

Diameter of 16 meters

Radius of 7 meters

Diameter of 8 meters. That is ur order

5 0
3 years ago
Read 2 more answers
If f(x)=x and g(x) =2, what is (f•g)(x)
slavikrds [6]
The answer is c. You distribute the X to the F and G. f(x) + g(x), which is x + 2.
7 0
3 years ago
a ladder leans against the sufe of a house. the angle of elevation of the ladder is 70 degrees when the bottom of the ladder is
nekit [7.7K]

Answer:

≈ 35.1 ft

Step-by-step explanation:

The model is a right triangle with ladder being the hypotenuse and the angle between the ground and the ladder is 70°

Using the cosine ratio, with l being the length of the ladder.

cos70° = \frac{adjacent}{hypotenuse} = \frac{12}{l} ( multiply both sides by l )

l × cos70° = 12 ( divide both sides by cos70° )

l = \frac{12}{cos70} ≈ 35.1 ( to the nearest tenth )

The ladder is approx 35.1 ft long

4 0
3 years ago
If all of the diagonals are drawn from a vertex of an octagon, how many triangles are formed?
Lynna [10]
There are 6, you'd think there would be 8 but the answer is actually 6. A diagonal is a line segment that connects to vertices, the two vertices chosen do not count when forming the triangle, two vertices that are adjacent to that chosen vertex are NOT included when forming the diagonal. It's confusing, but I hope this helps. If you have any follow up questions I'd love to answer them.
3 0
3 years ago
Read 2 more answers
Other questions:
  • Jessica is at a charity fundraiser and has a chance of receiving a gift. The odds in favor of receiving a gift are 5/12. Find th
    11·1 answer
  • Which expressions are equivalent to the one below? Check all that apply.
    5·1 answer
  • Melissa has found that her most recent "third quarter earnings", are 2.4% below last year's earnings, for the same period. If sh
    9·1 answer
  • Trigonometric problems.<br><br> Could someone help me with this? I’m confused.
    13·1 answer
  • In this diagram, BAC – EDF. If the
    9·1 answer
  • I need the solution to 5x+2y=7 and 7x+6y=-3
    6·1 answer
  • Help!? Helping my son with geometry ... I have no clue what I’m doing here
    12·1 answer
  • $1000 is invested in an account at interest rate r=0.045, compounded continuously. Find the time required for the amount to doub
    14·1 answer
  • NEED AN ANSWER BEFORE 2:40!!!
    13·2 answers
  • Please answer this I need this ASAP to bring up my grade!!!!!
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!