Top answers

Solve the simultaneous equations, 8x + 4y = 4 and 6x - 18y = 16

8x + 4y = 4,4y = 18 - 8x,2y = 2 - 4x,18y = 18 - 36x,6x - 18y = 16,18y = 6x - 16,6x - 16 = 18 - 36x,42x = 34,x = 34/42 = 17/21,18y = 90 - 36(17/21),18y = 426/7,y = 71/21
DG
Answered by Dione G. • Maths tutor
3798 Views

When do you use 'ser' and 'estar' in Spanish?

You can use the verb 'ser' when talking about something temporary eg. emotion: soy feliz - I am happy, physical characteristic: soy baja - I am small. Ser is also used with time eg. son las once - it's 11 o'...
RG
2665 Views

What's the best way to solve projectile problems in Mechanics?

Getting a complicated problem of a mass being projected at a weird angle can seem daunting at first but these problems can be solved easily by breaking them down into two simpler problems.Using trigonometry,...
OA
2971 Views

Explain why income tax in the UK is an example of progressive taxation?

Progressive taxation refers to a tax becoming progressively more substantial as an individuals income rises. This means as a person earns more income they are taxed more on the increase in income that they h...
JR
Answered by James R. • Economics tutor
4110 Views

An area of a garden needs to be tiled. It consists of a square area of 10m by 10m, with an outdoor pool in the middle of radius 3m. The tiles to be used are 50cm by 50cm, and cost 50p per tile. Find out how much it will cost to tile the area.

Calculate total area of space: A = 10 10 = 100m 2 Calculate area of pool: A = Pi r 2 = 3.142 3 2 = 28.27m 2 Difference in area = 100m 2 - 28.27m 2 = 71.73m 2 Calculate area of one tile: A = 0.5 0.5 = 0.25m 2...
MC
Answered by Matthew C. • Maths tutor
3468 Views