Top answers

Y=3x^2-2 ( Make x the ubject of the formula

x=((y+2)/3)^1/2
TP
Answered by Talha P. • Maths tutor
4489 Views

find the values of x when 3x^2 - 6x - 9

First we will need to factorise the equation. Start with the 3x^2 term and notice 3 is prime so must have 3x and x terms. (3x - 9) (x + 1) or (3x + 3) (x - 3) Setting the brackets to 0 gives us 3x - 9 = 0 an...
DM
Answered by Dylan M. • Maths tutor
5372 Views

Solve the simultaneous equations: 4x + 7y = 1, 3x + 10y = 15.

4x + 7y = 1 1. 3x + 10y = 15 2. 1. x 3 (4x x 3) + (7y x 3) = 1 x 3 12x + 21y = 3 3. 2. x 4 (3x x 4) + (10y x 4) = 15 x 4 12x + 40y = 60 4. 4. - 3. (12x - 12x) + (40y - 21y) = 60 - 3 19y = 57 y = 57/19 y = 3 ...
IJ
Answered by Isabelle J. • Maths tutor
6379 Views

Find W where: 11-W/4 = 1+W

11-W/4 = 1+W 11-W = 4+4W (Multiply both sides by 4) 11 = 4+5W (Add W to both sides) 7 = 5W ( Subtract 4 from both sides) W = 7/5 (Divide both sides by 5 to get your final answer)
LW
Answered by Liam W. • Maths tutor
10802 Views

The formula for finding the circumference of a circle is Equation: C = 2(pi)r . What can we do if we know the circumference but want to know the radius?

Rearange the equation to make r the subject of the formula. So we divide both sides by 2(pi)
AM
Answered by Amy M. • Maths tutor
7058 Views