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Maths
GCSE

Kelly is trying to work out the two values of w for which 3w - w^3 = 2 Her values are 1 and -1 Are her values correct? You must show your working.

Firstly substitute her first value into the equation so w=1 giving (3 x 1) - (1)^3 = 3 - 1= 2 so her first value for w is correct Next substitute the second value into the equation so w= -1 giving (3 x -1...

Answered by Eve N. Maths tutor
9856 Views

GCSE: How do you find the bearing of point B from A?

  1. Draw a line pointing North from point A.

  2. Use a ruler to draw a line that joins points A and B.

  3. Use a protractor to measure the angle between the line that is ...

Answered by Marcel P. Maths tutor
14514 Views

Work out 2 and 3/4 x 1 and 5/7 Give your answer as a mixed number in its simplest form.

First make each fraction into an improper fraction so on the top of the first fraction it would be 3 + (2 x 4) = 3 + 8 = 11 therefore first fraction = 11/4 for the second fraction the top = 5 + (1 x 7) = ...

Answered by Eve N. Maths tutor
28156 Views

2x-4=6, find x.

[add 4 to both sides] 2x=10 Therefore, x=5

Answered by Elena W. Maths tutor
3746 Views

solve the simultaneous equations , 5a+2b=23 & 9a-2b=19, algebraically.

find sum of both equations: 14a=42, therefore a=3, substitute 'a' into an equation: (5x3)+2b=23, therefore 2b=8, therfore b=4

Answered by Rohan P. Maths tutor
4149 Views

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