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If p = (3a + 5)/(4 - a), make a the subject of the formula

You want to end up an equation that show what a is in terms of p. To make things simpler, we want to get rid of the fraction on the right by multiplying both sides by (4 - a). If we do this we end up with: p...
AI
Answered by Ahmed I. • Maths tutor
3916 Views

Calculate 3/5 + 5/8. Give your answer as a mixed number in its simplest form.

To answer this question, create the least common denominator possible. In this instance, the LCD is 40. (I know this because multiples of 5 only end in 0 and 5, and 40 is the lowest multiple of 8 that meets ...
EP
Answered by Emily P. • Maths tutor
15900 Views

How do I calculate the length of a regular pentagon's edge when I know that it has the same perimeter as a triangle who's perimeter is 30cm?

The first thing I would do is sketch a diagram of a triangle and a pentagon. I find that tutees learn best when they can see what's going on so this makes the explanation easier to understand. After having s...
JA
Answered by Jason A. • Maths tutor
4051 Views

Factorise x^2 + 10x + 24

First, we need to find two numbers which add together to make 10 such as 2 and 8, 6 and 4 or 7 and 3, listing these combinations. Next, we need to do the same but finding combinations of numbers which multip...
PF
Answered by Phoebe F. • Maths tutor
4655 Views

Using your knowledge that tan(x) = sin(x) / cos(x) , how would you write 4/7tan(x)

Since tanx = sinx / cosx that means that the inverse of tan must = the inverse of sinx / cosx which is cosx / sinx . So we know that 1/tanx = cosx . Now all we have to do is apply the multiple 4/7 because 4/...
Answered by • Maths tutor
4166 Views