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Solve the curve xy=2 and x+y=3

This question is a simultaneous equation, this means we substitute one value into the other equation.We are looking for the points where the curves intersect.First I would take x+y=3 and bring the y over to ...
PM
Answered by Peter M. • Maths tutor
5269 Views

What is the value of an investment of £4500 with compound interest of 1.3% after six years?

We solve this by multiplying the starting value, £4500 , by 1 + {the interest rate expressed as a decimal} , or in this case, 1 + 0.013 . This gives us £4500 x 1.013 6 and when we type this into our calculat...
MC
Answered by Mark C. • Maths tutor
3819 Views

How do you solve simultaneous equations

So let's use 2x + 5y = 11 and 3x - 5y = 4 as our example.In these equations we have 2 unknown variables, x and y which we are trying to work out. The numbers in-front of the letters are the amount of times w...
SC
Answered by Siobhan C. • Maths tutor
4769 Views

Megan buys a car for £7,700 plus 20% VAT. She pays a deposit for the car and then pays the rest in 12 equal instalments of £642.50. How much did Megan pay as a deposit?

7700 x 1.2 = 9240 (total cost of car)12 x 642.5 = 7710 (total cost of instalments)9240 - 7710 = 1530Answer = £1,530
CD
Answered by Charles D. • Maths tutor
3360 Views

There are some people in a cinema. 3/5 of the people in the cinema are children. For the children in the cinema, number of girls:number of boys = 2:7. There are 170 girls in the cinema. Work out the number of adults in the cinema.

We can begin by working out the total number of children in the cinema. We know that for every 2 girls, there are 7 boys, which is the same as saying for every 1 girl, there are 3.5 boys. Three and a half bo...
TB
Answered by Tayla B. • Maths tutor
25350 Views