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Marina CMI [18]
2 years ago
6

The midpoint of (3 x, -2) and (-4, 5y) is (1,4). find x, -y​

Mathematics
1 answer:
Mariana [72]2 years ago
7 0

Answer:

(x,-y): (2,-2)

Step-by-step explanation:

M=(x+x)/2,(y+y)/2

Given (1,4)=

\frac{3x - 4}{2}

This implies:

1 =  \frac{3x - 4}{2}

3x - 4 = 2 \\ 3x = 2 + 4 \\  \frac{3x }{3}  =  \frac{6}{3}  \\ x = 2

In a similar way,

4 =  \frac{ - 2 + 5y}{2}  \\  - 2 + 5y = 8 \\ 5y = 10 \\ y = 2

The question demanded (x,-y)

Hence(2,-2) is the answer

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Step-by-step explanation:

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3 years ago
2(4x-1)+3=7<br> i'm little confused on this
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Answer:

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Step-by-step explanation:

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4 0
3 years ago
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IrinaVladis [17]

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Step-by-step explanation:

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Add 12 to both sides of the equation

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