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differentiate the function (x^2 +5/x + 3) with respect to x

2x + 5 lnx

Answered by • Maths tutor

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At a concert, the number of men, women and children can be expressed with the following ratio: 6:11:4 There were 6525 more women than men. How many children were at the concert?

We know there are 6525 more women than men. We can deduce that 5 'parts' = 6525 as 11-6=5If 5 parts = 6525. 1 part = 6525/5 = 1305.We know that 4 parts are children so, 1305 * 4 = 5220Alternatively, once ...

Answered by Sandesh R. • Maths tutor

4509 Views

Solve the simultaneous equations 3x + y = 11 and 2x + y = 8.

First identify which unknown has the same coefficient. In this case it is y.Either add or subtract the two equations to eliminate y. In this case we subtract one equation from the other (can be either). 3...

Answered by Natasha C. • Maths tutor

2989 Views

If a right angled triangle has its longest side 7cm and another side is 4cm then how long is the other side of the triangle? Show your working

Right angle means use Pythagorus:
a² + b² = c²
thereforea² = c² - b² = 7² - 4² = 49-16 ...

Answered by Jayan C. • Maths tutor

2293 Views

You are asked to choose from the meal deal at school, there are 9 varieties of sandwich, 6 varieties of snack and 8 varieties of drink. The meal deal consists of a sandwich, snack and drink - how many different combinations of meal deal are there?

As described, the meal deal consists of 1 sandwich, 1 snack and 1 drink. To work out the number of combinations possible you times the number of available sandwiches, by the number of available snacks, by...

Answered by Frances C. • Maths tutor

9724 Views