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Alexandra [31]
3 years ago
11

Need help on answering number 14.

Mathematics
2 answers:
Lana71 [14]3 years ago
6 0
Y is equal to -35, plug in x in the other equation.
olga nikolaevna [1]3 years ago
4 0
Y=7x
If x is equal to -5, and you need to solve for y, you need to plug in -5
Y=7(-5)
Y=-35
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-3x-y=-17 4x + 2 y equals 20
ExtremeBDS [4]
-3x - y = -17
4x + 2y = 20

multiply one part of the equation so that we can be able to use the process of elimination.

(-3x - y = -17)2
4x + 2y = 20

Now we have:

-6x -2y = - 34
4x+2y= 20
------------------------
-2x = -14

Divide -2 on both sides.

-2x = -14
/-2       /-2

x = -7.


=============================================

To solve for y, we just have to substitute the value of x to any of the equation given above, that we feel comfortable with. And I'm going to choose this equation: 4x + 2y = 20


4x + 2y = 20

4(-7) + 2y = 20

-28 + 2y = 20

Add 28 on both sides

-28 + 2y = 20
+28          +28
---------------------
2y = 48
/2      /2

y = 24.


The last thing you would do is to check if the answers is correct.
All you have to do is plug in the values of x and y into both equations and see if they equal to one another.

You may have to do this by yourself :P

Anyways, if you have any questions about this topic, feel free to PM me or any other users interested. Thank you for being part of Brainly! Have a nice day!










4 0
3 years ago
Imagine a clock with the hour hand at 12 and the minute hand at 2. does the angle formed by the two hands have a measure greater
myrzilka [38]
Yes it is greater, 1/4 would be a v shape. the question is 90 degrees the other is approximately 25 degrees. hope this helps!
6 0
3 years ago
What is the surface area of a sphere with a circumference of 100T? Leave
mixer [17]

Answer:

10000π units²

Step-by-step explanation:

From the question given above, the following data were obtained:

Circumference (C) = 100π

Surface Area of sphere (SA) =?

Next, we shall determine the radius. This can be obtained as follow:

Circumference (C) = 100π

Radius (r) =?

C = 2πr

100π = 2πr

Divide both side by 2π

r = 100π / 2π

r = 50 units

Finally, we shall determine the surface area of the sphere. This can be obtained as follow:

Radius (r) = 50 units

Surface Area of sphere (SA) =?

SA = 4πr²

SA = 4 × π × 50²

SA = 4 × π × 2500

SA = 10000π units²

Therefore, the surface area of the sphere is 10000π units²

3 0
3 years ago
I WILL GIVE BRAINLIEST TO WHOEVER IS CORRECT
KatRina [158]
-2, 3 is the correct answer
3 0
3 years ago
Read 2 more answers
Determine the relationship between the number of desks in the classroom and
mash [69]

30 + 8 = 38 desks

38 x 4 = 152 legs

If you did not add those eight desks then you will have 120 legs.

So, the amount of legs will go up by 32 if you add 8 more desks.

7 0
3 years ago
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