Jichu

Most popular questions and responses by Jichu
1. Maximum value

Consider the function with rule f(x) = |x^2-ax|, where a is a positive constant. Find the maximum value of the function in the interval [0,a] How do you do find that?

2. 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

3. 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

4. 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

1. math

4.09

posted on December 28, 2016
2. 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
3. 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
4. Math

10 million = 10,000,000

posted on December 28, 2016
5. Math

41/24

posted on December 28, 2016
6. 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
7. 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
8. 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
9. Math

Let x = one number and y = second number Hint: Equation #1: x+y=30 Equation #2: x^2 - y^2 = 180 x = 30-y (30-y)^2-y^2=180 y^2-60y+900-y^2=180 -60y=-720 y=12 x = 30-12 x=18

posted on December 28, 2016
10. 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