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BIDMAS

When solving a maths problem you can't just do it in any order. 'BIDMAS' is a way to remember what order to solve in. It stands for: B rackets I ndices D ivision M ultiplication A ddition S ubtractionFor exa...
AH
Answered by Anna H. Maths tutor
2911 Views

Solve the equation 2(3x-5)=7

Firstly expand the brackets due to BIDMAS.6x-10=7Now we want to have x on its own side, so add 10 to both sides.6x=17Finally we want to solve to find x, so divide both sides by 6.x=17/6
WB
Answered by Will B. Maths tutor
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What is 6 3⁄9 as an improper fraction?

To convert a mixed fraction to an improper fraction (top-heavy), follow these steps: 1. Multiply the whole number part by the number in the denominator. So 6x9 = 54.2. Add this result to the number in the nu...
PA
Answered by Prachi A. Maths tutor
6901 Views

The function f is defined by f (x) = e ^(x+2), where x is any real number. Find f ^-1(x) and state its domain.

y=e x+2 , we want to make x the subject, x+2=ln(y), x=ln(y)-2, now that x is the subject, the inverse of the function can be found by swapping the x and the y. Therefore the inverse function is y=ln(x)+2, th...
JC
Answered by Jacob C. Maths tutor
4618 Views

how do you calculate a percentage of a number?

The easiest way to do it is by using a simple equation. You know that the number N you want to find the percentage of is the "total", which means it is 100%. Let's call X the result of the percenta...
FB
Answered by Francesca B. Maths tutor
2671 Views