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Can you see what I have done wrong in this maths question

can you see what I have done wrong and if you know can you point me in the right direction.
(edited 3 years ago)
Reply 1
What was your working/explanation?
Original post by mqb2766
What was your working/explanation?

I worked out the gradient of the radius which would be 4-0/-3/0 = -4/3
Then I found the negative reciprocal to work out tangent which is 3/4
I then found the equation of the tangent so:
-4=3/4(-3)+c
-4=-9/4+c
7/4=c
y = 3/4x+7/4
Reply 3
Y is 4, not -4 when working out c.
Original post by mqb2766
Y is 4, not -4 when working out c.

sorry, i meant to put 4. it would still get 7/4. it was just a typing error
Reply 5
Original post by Maths Questions
sorry, i meant to put 4. it would still get 7/4. it was just a typing error

How?
Original post by mqb2766
How?

I just realized what I have done wrong. Thanks for the help. I was meant to do 4--9/4 to get the answer.
Reply 7
Original post by Maths Questions
I just realized what I have done wrong. Thanks for the help. I was meant to do 4--9/4 to get the answer.

Yes. It's r^2/y = 5^2/4 = 25/4
Original post by mqb2766
Yes. It's r^2/y = 5^2/4 = 25/4

Bye. Thanks for the help

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