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Solve the simultaneous equations 4x + 5y = 13 and 3x - 2y = 27.

Using the elimination method to remove the variable x, we need both equations to have the same values of x. To do this we find the lowest common multiple of the x values: the lowest common multiple of 3 a...

Answered by Christy H. • Maths tutor

7576 Views

How do you form the imperfect past tense and what is the difference between the preterite and the imperfect tense?

The imperfect past tense is formed with the endings:AR verbs Yo - abatú - abasel/ella - aba nosotros - abamos vosotros - abais ellos/ellas - aban ER and IR verbs yo - ía tú - ías el/ella - ía nosotros - í...

Answered by Lucy C. • Maths tutor

2605 Views

Solve 29cosh x – 3cosh 2x = 38 for x, giving answers in terms of natural logarithms

Firstly, we need the equation to be in terms of one cosh argument if possible, which can be done by the identity cosh 2x = 2cosh²x - 1. Upon substitution and simplification we get 6cosh²

Answered by Jacob C. • Maths tutor

4134 Views

How can I figure out what percentages to use in word problems?

Always remember that all the information you need to find the answer is in the word problem. It is always helpful to write out essential numbers at the top of your working so that you can better visualise...

Answered by Baraka M. • Maths tutor

1281 Views

How do I add fractions?

The most important thing to remember about adding fractions is that the denominators of both fractions must be the same value in order for you to add them together. Where the denominators of each fraction...

Answered by Baraka M. • Maths tutor

2005 Views