[Math4u] Q ???

Hi every one, I have questions:

 

1. Find point P(x,y) of the graph of the equation: y = x^2 , such that the slope of the line

 

passing through the point (3,9) and P is 15 / 2 .

 

 

2. Find two numbers whose sum is 18 and whose product is a maximum .

 

 

3. Vertex of a parabola: y = - x^2 + 8x + 2c  is a point on the x-axis , then find the value of 

" c ".

 

4. One side of a right triangle is 3m longer than the shortest side, if hypotenuse is the square root of 65m in length then, the length of the shortest side ?

 

<<PLEASE I NEED YOUR HELP >>

 

regards

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