Question

The point (1,2) lies on y=2x+c
, then the value of c is
a) I b) - 1 c)2 d)0

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Answer 1

Step-by-step explanation:

The answer is option d. hope it helps. follow me

Answer 2

Answer:

MATHS

The points (1,3) & (5,1) are two opposite vertices of a rectangle. The other two vertices lie on the line y=2x+c. Find c & the remaining vertices

November 22, 2019avatar

Chandrakant Guna

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ANSWER

Since, diagonals of rectangle bisect each other, so mid point of (1,3) and (5,1) must satisfy y=2x+c i.e (3,2) lies on it

⇒2=6+c⇒c=−4

Therefore other two vertices lies on y=2x−4

Let the coordinate of B be (x,2x−4)

Therefore slope of AB . slope of BC=−1

⇒(

x−1

2x−4−3

​

).(

x−5

2x−4−1

​

)=−1

⇒(x

2

−6x+8)=0⇒x=4,2⇒y=4,0

Hence, required points are (4,4),(2,0)

Step-by-step explanation:

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