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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+c, so y2-...
VB
Answered by Vedant B. • Maths tutor
5075 Views

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

V= 4(h 3 +1) 0.5 - 4 dV/dh= (4x 0.5) x 3h 2 x (h 3 +1) -0.5 => 6h 2 (h 3 +1) -0.5 Substitute h=2 into dV/dh => (6x2 2 )x(2 3 +1) -0.5 => 24 x 1/3 = 8
OD
Answered by Oliver D. • Maths tutor
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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
3625 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 ca...
DH
Answered by Dorothy H. • Maths tutor
4123 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 multiplication. ...
MB
Answered by Matthew B. • Maths tutor
4163 Views