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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
4121 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
9452 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
10525 Views

Factorise the expression: 2x^2 + 17x + 21

There are several ways to factorise this quadratic expression, but the best way in my opinon is: Take the constant in front of the x^2 and multiply it by the standalone constant (i.e. multiply 2 by 21, which...
TM
Answered by Tushar M. • Maths tutor
9805 Views

Solve the simultaneous equations: 4x+y=25 and x-3y=16

Lets first give the equations names. 4x+y=25 (A) x-3y=16 (B) We want to get the equations so that they have either the same number of x's or same number of y's. So let's multiply equation (A) by three so tha...
MD
Answered by Michael D. • Maths tutor
10135 Views