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shusha [124]
3 years ago
12

3x + 5y = 78

Mathematics
1 answer:
Marat540 [252]3 years ago
3 0
X = 6
y = 12

hope this helps at all.

you rewrite the second equation as <span>2x=y</span> and then replace the y in the first equation by <span><span>2x</span></span>
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Use the four functions below for this question:
Darina [25.2K]
f (x ) = 2 x + 5
For g (x) we will solve the system:
- 1 =-2 m + b
+
-9 = 2 m + b
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-10 = 2 b,  b = -5
-9 = 2 m - 5
2 m = -4
m = -2
g ( x ) = - 2 x - 5
For h (X):
m = (-1-5 ) / ( 3-0 ) = -6/3 = -2
5 = 0 + b,   b = 5
h ( x) = - 2 x + 5.
Now we have 4 linear functions:
1 ) f ( x ) = 2 x + 5
The slope is m = 2, y - intercept: y = 5 , zero: x = -2.5 and the function increases ( m > 0 ).
2 ) g(x) = - 2 x - 5
The slope is m = - 2, y-intercept: y =-5 , zero: x = -2.5 and the function decreases ( m < 0 ).
3 ) h ( x ) = - 2 x + 5
The slope is m = - 2, y - intercept . y = 5, zero: x = 2.5 and the function decreases.
4 ) j (x) = 2 x + 5
The slope is m = 2, y -intercept: y = 5, zero: x = -2.5 and the function decreases.
The functions f( x ) and j ( x ) are parallel and also g( x ) and h ( x ). They have the same slope.  
The functions f ( x ) and j (x ) are increasing and h ( x ) and h ( x ) are decreasing.
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4 years ago
Please help! <br><br> What is the value for y?<br><br> Enter your answer in the box.<br><br> y =
Amiraneli [1.4K]

The little lines through the two sides mean they are the same length.

When the two sides are the same length the 2 corresponding angles are also the same, so Angle A and Angle B are both 34 degrees.


The three inside angles of a triangle equal 180, so angle C = 180 - 68 = 112


Angle C is given as 4y, so 4y = 112

Divide both sides by 4:

y = 112 / 4

y = 28

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3 years ago
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melomori [17]

Hello,

Sadly, I can't help you, because it seems as the question has been cut off. If you can update your question with the rest of what is asked, or the different choices, I'd be more than happy to assist you in any way I can!

I will update my answer then.

Thank you!

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What is 4/5 divided by to make it a decimal
brilliants [131]
The decimal representation for 4/5 would be,
0.8
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Answer:

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