Top answers

A graph is sketched with the equation x^2+4x-5. Find the minimum point of this graph.

Okay so the first thing we can identify is that it is a quadratic, hence the x 2 at the beginning. From this we can now start to answer the question. To calculate the minimum point we must " complete th...
HS
Answered by Harry S. • Maths tutor
5306 Views

For the curve C with equation y = x4 – 8x2 + 3. Find dy/dx

dy/dx= 4x 3 _ 16x
EP
Answered by Edward P. • Maths tutor
4213 Views

Richard wants to find out how often people buy crisps, a) name two things that are wrong with his survey question and b) create a better one

This is Richard's question on a survey: How often do you buy crisps? Often [ ] Sometimes [ ] Never [_] (a) Write down two things that are wrong with this survey question If you are writing a survey you shoul...
GW
Answered by Gemma W. • Maths tutor
9556 Views

If a rectangle has area 48cm2 and sides length 6cm and (3x+2)cm, what is the value of x?

First we need to look at the important information and draw a diagram (on whiteboard). Now, we know that the area of the rectangle is 48cm2 and that the area of any rectangle is: length side a x length side ...
RH
Answered by Rebecca H. • Maths tutor
10637 Views

The point p lies on the curve with eqn x = (4y - sin(2y)^2, given that p has coordinates (p,π/2), p is a constant, a) find the exact value of p; the tangent to the curve at P cuts the y-axis at A, b) use calculus to find the coordinates of A.

a) Sub y= π/2 into equation, hence x coordinate is 4π^2 b) to find equation of the tangent, differentiate the equation using the chain rule (wrt y) and then substitute the coordinates of p into the different...
MO
Answered by Mar O. • Maths tutor
10093 Views