Top answers

Maths
GCSE

If a line is in the form y=mx+c why does m give you the gradient of the line

gradient is change in y over change in x.

if (x1,y1) and (x2,x1) are lines on a graph then the change in y is y2-y1 and change in x is x2-x1, and since they are both on the line y1=mx1+c and y2=mx2...

VB
Answered by Vedant B. • Maths tutor
4485 Views

V= 4(h^3 +1)^0.5 - 4, find dv/dh when h=2

V= 4(h3+1)0.5- 4 dV/dh= (4x 0.5) x 3h2 x (h3+1)-0.5  =>  6h2(h3+1)-0.5 Substitute h=2 into dV/dh   => (6x2

OD
Answered by Oliver D. • Maths tutor
5029 Views

a). Solve x-4=13, b). solve 7y=35 c). solve 3w-9=27

a).  x-4=13

13+4=17

x=17

b). 7y=35

35/7=5

y=5

c). 3w-9=27

3w=27+9

3w=36

w=36/3

w=12

JM
Answered by Joe M. • Maths tutor
3278 Views

How do you solve simultaneous equations?

I will run through an example of how to solve a set of simultaneous equations. In simultaneous equations you are given two or more algebraic equations and you need to solve them for the variables, usually...

DH
Answered by Dorothy H. • Maths tutor
3620 Views

How do you divide fractions?

When dividing fractions you must remember the KEEP, CHANGE, FLIP rule.

KEEP - The first fraction you KEEP as it is, you don't change it.

CHANGE - You now change the sign from a division to a...

MB
Answered by Matthew B. • Maths tutor
3626 Views

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