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timofeeve [1]
2 years ago
6

8x-5y=15 6x+4y=43solve the system by any method​

Mathematics
1 answer:
Sedbober [7]2 years ago
5 0

Answer:

x=\frac{275}{62} , y=\frac{127}{31}

Step-by-step explanation:

<h3>I will use the elimination method.</h3>

We want to make the X's the same:

24x-15y=45

24x+16y=172

Because the signs of the X's are the same we subtract the 2 equations to make:

(I put the second one on top of the 1st)

31y=127

So:

y=\frac{127}{31}

Substitute y into either equation 1 or 2:

(I chose equation 1)

8x-5(\frac{127}{31})=15

8x=5(\frac{127}{31}) + 15

x=\frac{5(\frac{127}{31})}{8}

So:

x=\frac{275}{62}

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Which number is located at Point A on the number line?
taurus [48]

Answer:

-4

Step-by-step explanation:

-10,-9,-8,-7,-6,-5,-4,-3,-2,-1,0,1,2,3,4,5,6,7,8,9,10

                       ^   ^

the ^ on the left is -5 and one number over is 4 which is the ^ on the right

6 0
3 years ago
Drag the numbers and the parentheses to create an equivalent addition sentence that illustrates the associative property of addi
adelina 88 [10]

Answer:

It would be (3+2)+4=9

Step-by-step explanation:

you just have to switch to numbers.

8 0
2 years ago
I don’t understand it
Sveta_85 [38]

y=12-1.25x

honestly i dont know if this is right so sorry if its not.

8 0
2 years ago
Read 2 more answers
At what temperature would the centigrade and Kelvin scales give similar readings<br>​
Serjik [45]

Answer:

The formulas for converting between degree Celsius and degree Fahrenheit are:

°F = (°C * 9/5) + 32

°C = (°F - 32) * 5/9

To find the temperature when both are equal, we use an old algebra trick and just set ºF = ºC and solve one of the equations.

°C = (°C * 9/5) + 32

°C - (°C * 9/5) = 32

-4/5 * °C = 32

°C = -32 * 5/4

°C = -40

°F = (°F * 9/5) + 32

°F - (°F * 9/5) = 32

-4/5 * °F = 32

°F = -32 * 5/4

°F = -40

So the temperature when both the Celsius and Fahrenheit scales are the same is -40 degrees

Have a nice day!!!

7 0
3 years ago
Find the exact length of the missing sides
Black_prince [1.1K]
For finding x:
We want to use tangent because tangent is opposite/adjacent
tan (30)= x/15
Multiply both sides of the equation by 15 to isolate x
Now we have, (15)(tan 30) = x
Simply plug the above equation into your calculator and you should get x=8.66

For y:
We know the angle opposite side y is= 90˚ (it is marked as a right angle)
We are going to use cosine because cosine is adjacent/hypotenuse
So, cos(90)= 15/y
Multiply by y
(y)(cos 90)=15
Now use simple algebra
cos (90) = 0
Y x 0 =15
y=15

Hope this helps. By the way, I am a little rusty on this topic so I am not 100% sure that this is right (I'm 98% sure).

 
6 0
3 years ago
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