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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...

Answered by Vedant B. • Maths tutor

3972 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

Answered by Oliver D. • Maths tutor

4664 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

Answered by Joe M. • Maths tutor

2929 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...

Answered by Dorothy H. • Maths tutor

3032 Views