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Solve the equation (2x+3)/(x-4)-(2x-8)/(2x+1)=1 and give the answer to 2 decimal places

To start off with we need to remove the two denominators (the bottom part of the fractions) on the left hand side of the equation. This can be achieved by multiplying the through the whole equation by (x-4)(...
JJ
Answered by Jake J. • Maths tutor
9950 Views

What is the largest possible length of a pole you could fit in a room?

Lets say you are in a cubical grain silo, with a height of 12m, and a base with dimensions 3m by 4m. If you wanted to fit a pole in the silo, what is the largest possible length of the pole? The length we ar...
TW
Answered by Tom W. • Maths tutor
6442 Views

What's the inverse of the function f=x+2?

If we apply a function and then its inverse, we should get back to where we started. Suppose we start with an element x. If we apply f to it, we get to x+2. In order to get back to where we started (i.e. x),...
MG
Answered by Marco G. • Maths tutor
4746 Views

Why is anything to the power 0 equal 1?

This is often overlooked as no-one gives a reason to why this is and is often stated as a fact. We start off with the basic indice law of x y * x z = x y+z . For example, Likewise with division, you can have...
PB
Answered by Pavit B. • Maths tutor
5851 Views

Given that your grade for your computing is based on 5 coursework that weigh differently, and you know the results of 4: 80, 75, 50 and 90 which weighs 10%, 20%, 45% and 5%. What grade do you need in your last coursework to achieve at least a B (70%)?

You know the following: A) 80, 10% B) 75, 20% C) 50, 45% D) 90, 5% E) X, (100-10-20-45-5)% = 20% Therefore, create a formula with the facts given and the mean marks must be at least 70. Note that 10% is equi...
CZ
Answered by Chen Z. • Maths tutor
4746 Views