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myrzilka [38]
3 years ago
15

How to do this equation by elimination 8x +14y= 4 and -6 + -7y =-10

Mathematics
2 answers:
svet-max [94.6K]3 years ago
5 0
8x + 14y = 4
-6x - 7y=-10  / *2

8x + 14y=4
-12x -14y= -20
_________________
-4x=-16 => x=4; y= -2
Leokris [45]3 years ago
4 0

Answer:

y=4/7, x=-1/2

Step-by-step explanation:

Elimination is when you add the equations together

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Five times a number less than one hundred.
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Henrietta interviewed her classmates on their favorite subjects. She recorded their gender and favorite subject. She concluded t
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!NUMBER 4! please help!! show all work please
snow_lady [41]

Answer:

C. 88

Explanation:

f(x) = 4x + 8  ||  g(x) = x² + x

fg( -5 )

go from right to left in such function problems.

replace x with [ -5 ]

f( (-5)²  -5)

f(20)

[ replace x with 20 ]

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7 0
2 years ago
Triangle ABCis rotated 90° clockwise around the origin to get
Elanso [62]

Answer:

The distance A’C’ is 4.47 units

Step-by-step explanation:

Before we go on, we need to get the appropriate transformation

Mathematically, we have a 90 degrees clockwise rotation yielding the following;

(x,y) to (-y,x)

A is (-4,1)

C is (-2,5)

By transforming, we have

A’( -1,-4)

C’ (-5,-2)

To get the magnitude of the line segment, we are going to use the distance formula between points

We have this as;

D = √(x2-x1)^2 + (y2-y1)^2

D = √(-5-(-1))^2 + (-2-(-4))^2

D = √(-4)^2 + (2)^2

D = √(16 + 4)

D = √20

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7 0
2 years ago
Help on this question please!!!
OLga [1]

Answer:

Hello! Here is your answer

Step-by-step explanation:

112=4(28)

a=4b

You can only have one variable so:

Combine b to a:

a-b=84

4b-b=84

Divide both sides by 3:

3b/3=84/3

b=28

But that is not it:

Sum of both cards:

a+b

a=112

b=28

112+28=140

          = 140

I hope I was of help.  If not please let me know! Thank you! Good luck!

4 0
3 years ago
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