Jichu
Most popular questions and responses by Jichu
Maximum value
Consider the function with rule f(x) = x^2ax, where a is a positive constant. Find the maximum value of the function in the interval [0,a] How do you do find that?
asked on December 28, 2016 
Finding Range  Maths
Let f:{x: IxI > 100} => R, f(x) = 1/x^2. State the range of f. Let f:{x: IxI < 0.1} => R, f(x) = 1/x^2. State the range of f. *R = real numbers How do you find the two ranges? I know it sounds embarrassing but I am struggling to work out the range. Can you
asked on December 28, 2016 
Maths  Cartesian Equations
Find the corresponding Cartesian equation for each pair of parametric equations: x = t  (1/t) and y = 2*[t + (1/t)] The answer is y^2/16  x^2/4 = 1 I have no idea where to begin. I tried squaring both equations in hope to easily remove t^2 but ended up
asked on December 27, 2016 
Maths  Parametric Equations
A circle is defined by the parametric equations x = 2cos(2t) and y = 2sin(2t) for t is all real numbers. (a) Find the coordinates of the point P on the circle when t = (4*pi)/3. (b) Find the equation of the tangent to the circle at P. Can you please show
asked on December 27, 2016

math
4.09
posted on December 28, 2016 
Concentration of Hydrofluoric Acid
Not entirely sure what you mean but u can determine the concentration if u know the moles and volume. Concentration = moles/volume
posted on December 28, 2016 
SAT Math
72 students passed so 72/0.8 = 90 90/150 can be simplified to 3/5 Check my thinking
posted on December 28, 2016 
Math
10 million = 10,000,000
posted on December 28, 2016 
Math
41/24
posted on December 28, 2016 
Maths
Area of bathroom floor = 5^2 = 25m^2 Area of bathroom tile = (0.15)^2 25/(0.15)^2 = approx 1111 tiles
posted on December 28, 2016 
English
First of all, I personally will not write it for you because you need to learn to write by yourself. I can guarantee most of the tutors here will not write it for you either. Hint: Plan your story by creating a plot. Make sure it has a climax to be
posted on December 28, 2016 
Math
Let x = distance Hint: Draw a diagram. You should realise it's Pythagoras theorem x^2 = 7^2 + 24^2 x^2 = 625 x = 25 Answer: 25m SE
posted on December 28, 2016 
Math
Let x = one number and y = second number Hint: Equation #1: x+y=30 Equation #2: x^2  y^2 = 180 x = 30y (30y)^2y^2=180 y^260y+900y^2=180 60y=720 y=12 x = 3012 x=18
posted on December 28, 2016 
value
Hierarchy (if that is what you mean...) A system or organization in which people or groups are ranked one above the other according to status or authority. [Google]
posted on December 27, 2016