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Make X the subject of the equation (9x-7)/3 = 8y

To start solving a question like this you want to do it in a set of steps: Step 1: Get rid of the division. To do thsi you need to do the opposite function. The opposite of division is multiplication so you ...
RW
Answered by Ruth W. • Maths tutor
5895 Views

Rearrange the following, making c the subject: (3c + b)/2 = c + a

Rearranging is one of the trickier topics in GCSE maths, however as long as you follow it through step by step you shouldn't have a problem. The question asks you to make 'c' the subject. This means you need...
OC
Answered by Olivia C. • Maths tutor
16493 Views

Sam uses 140g of flour to make 12 cakes. How much flour will Sam need to make 21 cakes?

This question can be difficult, because it involve a lot of words. This can make it confusing as to what information we really need to use - just work it through step by step. Sam uses 140g of flour to make ...
OC
Answered by Olivia C. • Maths tutor
12411 Views

How do I do integration by substitution?

There are a number of integrals that we can evaluate directly, called elementary functions:integral[ x dx ] = x 2 /2 + Cintegral[cos( x ) dx ] = sin( x ) + C However, most integrals cannot be solved so direc...
MT
Answered by Matthew T. • Maths tutor
6744 Views

What are the possible value(s) of x for the following: x^2 + 3x - 54 = 0

It is a quadratic equation and when factorised will be of the form (x +/- a) (x +/- b) = 0. We need to find 2 numbers, a and b, that add together to make the 3 for the 3x term and which are multiplied togeth...
KG
Answered by Kate G. • Maths tutor
5972 Views