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Bag A contains £7.20 in 20p coins. Bag B contains only 5p coins. The number of coins in bag B is three-quarters of the number of coins in bag A. How much money is in bag B?

First you want to find out how many coins there are in bag A. So how many 20p coins do you need to make £7.20? This is the same as 720p. 720 divided by 20 is the same as 72 divided by 2 which is 36. So there...
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Answered by Anezka E. • Maths tutor
13013 Views

Do y=3x^2+5x+12 and y=3x-8 intercept with each other? If yes, at which point(s)?

This is like solving 2 simultaneous equations. Both equations are in a form of y=ax^2+bx+c. Equate both equations together and you got: 3x 2 +5x+12 = 3x-8 Put both polynomials at one side and you got: 3x 2 +...
JH
Answered by Justin H. • Maths tutor
5255 Views

How can I remember the difference between differentiation and integration?

A neat trick to remember what we do to the powers when integrating and differentiating is that we IN crease the power when we IN tegrate, and D ecrease the power when we D ifferentiate! Once we've got the po...
LW
Answered by Laura W. • Maths tutor
19578 Views

How should I go about factorising x^2+5x+6?

I always think of the middle number as the sum and the last number as the product (in this example, we have the sum as 5 and the product as 6!) This just means that we have to look for two numbers which add ...
LW
Answered by Laura W. • Maths tutor
4753 Views

How do you integrate by parts?

This is one of the trickiest methods of calculus on the course, but it's important to know, and is very doable if you set up the problem right and remember the steps. Integration by parts works when you have...
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Answered by Isaac E. • Maths tutor
6015 Views