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notka56 [123]
3 years ago
13

What is the solution to the system of equations?use the linear combination method

Mathematics
1 answer:
galina1969 [7]3 years ago
3 0
The 2 equations are 
-2x + y = -17 ---1)
3x + y = 23 ---2)
we need to have the same coefficient for one of the variables.
Already y variable has the coefficient of 1 for both equations so we can use the equations  as it is. 
2) - 1) subtract 1) from 2)
3x-(-2x) + y -y = 23-(-17)
5x = 40
x = 8
substituting x = 8 in the 2nd equation 
3*8 + y = 23
24 + y = 23
y = -1

solution - (8,-1)

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What is 3/x - 2/x = 1/5​
fomenos

Answer:

x=5

Step-by-step explanation:

See image below:)

4 0
3 years ago
A survey was done where males and females were asked if they would prefer to eat chicken or steak. The results of the survey are
alexgriva [62]

Answer:

Step-by-step explanation:

Number of tickets for international flights = 36

Total number of tickets = 95

The probability that a randomly selected airline ticket is for an international flight = 36 / 95 = 0.3789

The probability that a randomly selected airline ticket is for an international flight as a percent rounded to the nearest tenth of a percent = 0.3789 x 100 = 37.9%

% of males surveyed = 0.236 + 0.218 = 0.454 = 45.4%

% of males surveyed who prefer chicken = 0.236 out of 0.454 = 0.236 / 0.454 = 0.5198 = 51.58% = 52.0%

<em>hope this helps~</em>

6 0
3 years ago
Read 2 more answers
Find x on this problem
barxatty [35]
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3 0
3 years ago
Two birds sit at the top of two different trees. The distance between the first bird and a bird-watcher on the ground is 14.1 fe
Harman [31]
Use the trig ratio which gives you the most information. Here we have opposite and hypotenuse relative to angle x, so think sin( x ) = 14.1 / 27.9<span>Now we want to solve for x, but x is stuck inside the sine function
So how do we do this?
We can 'undo' the sine function by using the inverse sine. apply the inverse Sin to both sides of the equation.
sin^-1 ( sin(x) ) = sin^-1 ( 14.1 / 27.9)
the left side 'cancels' , leaving you with x
x = sin^-1 ( 14.1 / 27.9)</span><span>Now you need a calculator.
Make sure you are in degree mode.
Calculators can give you answer in radian or degree.
If you get a decimal answer, you are probably in radian mode.
Round up if you want nearest hundredth
30.3563 ≈ 30.36
Round up again if you want nearest tenth
30.36 ≈ 30.4
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7 0
3 years ago
If the interior angle of a regular polygon measures 108° how many sides does a polygon have
Marta_Voda [28]

Answer:

5 sides

Step-by-step explanation:

The quickest way to answer this is to use the fact the exterior angles of a polygon add to 360.

If the interior angles are each 108, then the exterior angles are each 180 - 108 = 72. (using the fact that the Interior angle + exterior angle adds to 180)

Next, we just work out 360 ÷ 72 = 5.

So the polygon must have 5 angles, and therefore 5 sides.

5 0
3 years ago
Read 2 more answers
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