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Solve 2x + 7 = 13

In this question we are as to solve this equation and therefore find the value of x. This means we need to isolate x to find a value for it. To do this we use the reverse rules for BIDMAS whereby the first s...
BB
Answered by Bilal B. • Maths tutor
27704 Views

Solve the Simultaneous equation: 4x+y=25, x-3y=13

Firstly, try and make one of the variables (x or y) the same in both equation, in this instance because we have a positive and negative y if we add them, they will cancel out. Therefore multiply the first eq...
AK
Answered by Anas K. • Maths tutor
5018 Views

Three girls and four boys are seated randomly on a straight bench. What is the probability that the boys sit together and the girls sit together.

To calculate the desired probability we need to calculate the number n of arrangements of the kids such that the girls sit together and the bous sit together and then calculate the total number m of arrangem...
JW
Answered by Jakub W. • Maths tutor
12308 Views

Integrate ln(x).

When tackling an unobvious integral question, first run through all the possible methods. I will now list the methods of integration: Substitution: could use this method, but it wouldn’t be particularly help...
MC
Answered by Melanie C. • Maths tutor
4928 Views

How do I simplify a fraction with surds on the bottom when the surd is part of a function?

When doing questions like this you simply times the top and bottom of the fraction by the bottom function but with a sign change. For example if "5 - √ 3" was the denominator of the fraction (on th...
CW
Answered by Charlotte W. • Maths tutor
8415 Views