Top answers

Maths
GCSE

How do I solve this pair of simultaneous equations: 3x+y=7 and 3x-y=5?

Step 1: Eliminate the ‘y’ component from the equations by adding the equations together. This gives the new equation ‘6x=12’

Step 2: Find the value of x by dividing both sides of the equation by 6....

AM
Answered by Alisha M. Maths tutor
4466 Views

Rearrange the following to make C the subject (3c+B)/2=C+A

to work this out you need to make the equation equal to C so it will look like C=A+B or something similar. to achieve this you need to change the equation so that C only appears on one side. you would nee...

OR
Answered by Oran R. Maths tutor
5061 Views

Factorise 2*x^2 - 4*x - 6

The question asks us to factorise the quadratic 2x^2 - 4x - 6. All quadratics are of the form ax^2 + bx + c, so we have a = 2, b = -4, c = 6. I would advise approaching it using the prod...

CT
Answered by Chris T. Maths tutor
4359 Views

What grade did you achieve?

I achieved an A in O level Mathematics.

RA
Answered by Rusab A. Maths tutor
3523 Views

Using the quadratic equation, solve 3x^2+2x-15 to two decimal places.

The quadratic equation is x=(-b+-SQRT(b^2-4ac))/2a. In this instance, a = 3, b = 2, and c = 15. Simply putting the numbers in place of the letter counterpart, gives an answer of 1.93 and -2.59 to two deci...

CF
Answered by Callum F. Maths tutor
5529 Views

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