Search our library of Maths questions

Top answers

Maths

All levels

What rules should I look out for when manipulating expressions?

FactoriseFactorise FullyExpandSimplifyExpand and Simplify

Answered by Mayowa O. • Maths tutor

2506 Views

how do ratios work

if x and y are in a ratio 3:2 you can write it as 3x=2y so if you are given a value for either you substitute it into this and rearange to get the other value. e.g y = 2 what is x? 3x=2(2) so 4=3x, x=3/4....

Answered by Andrew M. • Maths tutor

2116 Views

what do the numbers in a circle equation mean

(x+a)^2+(y+b)^2=c a is the a negative of the x coordinate of the centre b is the negative y coordinate. c is the seared radius.

Answered by Andrew M. • Maths tutor

1946 Views

where do the graphs y=3x^2-2x-5 and y=4x-2 intersect

3x^2+2x-5=4x-2 3x-2x-3=0 3(x^2-2/3x-1/3)=0 3((x-2/6)^2-4/36-1/3)=0 3(x-2/6)^2-1/3-1=0 x=2/6(+-)(4/9)^-2

Answered by Andrew M. • Maths tutor

2217 Views

Line L1 passes through points (4,6) and (12,2). Line L2 passes through the origin and has gradient -3. The two lines intersect at point P. Find the co-ordinates of P.

Gradient of L1 : Gradient = Change in y/ Change in x. Gradient = (2-6)/(12-4)= -1/2
Gradient is "m" in y=mx+cPlug in a point to determine c : 6 = -1/2 *4 + c --> c =8 L1 is ...

Answered by Bjorn L. • Maths tutor

5160 Views