Top answers

How do you solve simultaneous equations.

Step 1. Pick one of the equations and move all of the x values to one side of the equal and move all others to the other side e.g X = 2y + 3Step 2. Make sure the X value is not times by a number e.g 2 X, if ...
TM
Answered by Taylor M. • Maths tutor
3117 Views

Differentiate x^3+ x^2+2=y

This equals to dy/dx= 1/3 x 2 +1/3 x 1 This is because we divide by the power and then minus one from the powerSo it becomes x 3-1 /3 which can be simplified to 1/3 x 2 The 2 is differentiated to 0 because i...
VI
Answered by Vera I. • Maths tutor
3489 Views

Calculate the diameter of a circle with area 80cm^2 to two significant figures.

First you need to remember the equation area of a circle = πr 2 with r being the radius. Therefore as we are given the area of the cicle we need to rearrange the equation to give us the radius. Therefore thi...
MS
Answered by Matthew S. • Maths tutor
4554 Views

Solve the following equation. 7x^2 = 13x +2

First gather all x terms on left hand side,7x 2 -13x-2=0. Since 7 is a prime number we can begin factorisation,(7x+/-?)(x+/-?)=0. We know there must be a +/-2 and +/-1 in place of the question mark as they m...
LS
Answered by Lewis S. • Maths tutor
3953 Views

The equation of line L1 is y=3x-5. The equation of line L2 is 2y-6x+5=0. Show that these two lines are parallel.

To answer this question, you should make use of the general equation of a straight line: y=mx+c.For two lines to be parallel, they must have the same gradient (i.e. the same coefficient of x- which in the ca...
GJ
Answered by Gurvinder J. • Maths tutor
5934 Views