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A point P (x,y) moves so that its distance from the point (2,3) and the line y= -1 is equal. (i) Describe the locus of the P. (ii) Write the equation of the locus of P.

OK so the question was like Planet A has mass M and Planet B as mass 2M is the Ep of A x2 of B or 1/2 of B?

A deck contains six cards labelled the numbers 0,1,2,2,3 and 3. Ann draws two cards at random without replacement. (i) find the probability that the sum of the two cards equal 5 (ii) find the probability that the sum of the two cards in less than 5 Ok so i got the first answer, but...

yea we were told to put in our personal email put i wasnt able to change my email because i was at work experience but i did check all of emails and didnt receive anything in any of my folders. Ill just have to speak to my senior year coordinator before calling UAC itself.

OK so most people in my grade got an email with their UAC numbers but when i checked mine i didnt get anything. I checked every folder and all my different emails. When we first signed up for it as a school I signed up with my school email, however we were later notified to change it to our...

if i differentiate x=5cos(Pi/3)t wouldnt the cos turn into -sin??

OK so obviously for multiple choice they give you the answers but the problem is the don't show you how to get that answer. So the question I was stuck on was Q.7: A particle is moving in simple harmonic motion with period 6 and amplitude 5. Which is a possible expression for the velocity...

Thanks guys!

how did you figure out that x=1/2 (2x-1)+1/2?

This question is 11 e) from the 2015 paper. Im confused as too how to get rid of the x on the top of the function after differentiating the u and subbing in for dx because when you differentiate 2x-1 it turns into just 2 and i cant cancel out the x on the numerator. Someone please help thanks...

This questions is from HSC paper 2016 Q.12 b) In a chemical reaction, a compound X is formed from a compound Y. The mass in grams of X and Y are x (t) and y (t) respectively, where t is the time in seconds after the start of the chemical reaction. Throughout the reaction the sum of the...

I've been stuck on this for hours: The displacement x of a particle at time t is given by x = 5sin4t + 12cos4t . What is the maximum velocity of the particle? The answer is 52 but I have no idea how they got it please help!!!