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Maths
GCSE

Solve the simultaneous equations 3x + 2y = 12 and 10y = 7x + 16

First we need to rearrange both equations into the form ax + by = c (where a, b and c are the integers). We can label these 1. and 2.We then have:3x + 2y = 12 1.7x -10y = -16 2.In order to find the x valu...

AA
Answered by Anjali A. Maths tutor
3755 Views

The width of a rectangle is X cm.
 The length is 1·5 cm more than the width.
 The perimeter of the rectangle is 17 cm. Write down an equation satisfied by X
 and solve it to find X.

Let's call the length 'L', and the width 'X'. Since the length is 1.5cm more than width, we can form the equation: L = X + 1.5 (Equation 1)Let's call the perimeter 'P'....

OD
Answered by Oliver D. Maths tutor
6774 Views

Write the following in their simplest form: a) 8^0 b) 64^(2/3) c) 0.54545454...

a) 80 = 1b) 642/3 = (641/3)2 = 42 =16c) 0.54545454... = x 100x = 54.545454.... 100x-x = 54 99x = 54 x = 54/99 x = 6/11...

ES
Answered by Emmanuel S. Maths tutor
3148 Views

Solve the simultaneous equations: 5x+5y = 6 7x+3y = 6

Label the equations 1) 5x+5y = 6 and 2) 7x+3y = 6 . Then rearrange equation 1 to make x the subject of the equation: 5x = 6-5y. You would then simplify this equation to find the equation for x: x = 6/5 - ...

IB
Answered by Isobel B. Maths tutor
3312 Views

If a semi-circle has radius 4cm, work out the area of the semi-circle

The formula for the area of a circle is pir2,therefore for semi-circle, the formula becomes1/2pir2
Using our known values this is 1/2
pi*16 (4<...

BS
Answered by Ben S. Maths tutor
4410 Views

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