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v^2=u^2 + 2as u=12 a=-3 s = 18 Find v

First we can plug in the values we already know into the equation
we would get:
V2 = 122 + (2 x -3 x 18)
then we would seperate the two multiplications on the right ...

Answered by Oscar B. Maths tutor
6365 Views

Question from an Edexcel GCSE Maths Higher Paper (Nov 2018) - Solve the simultaneous equations: 5x + y = 21, x-3y = 9 (3 marks)

So since there are two unknowns in this question, its slightly more difficult than a normal equation where we only have 1 x or y that we're trying to work out. There are two ways to deal with this type of...

Answered by Maths tutor
2741 Views

Harry mixes white paint and blue paint in the ratio 2:5. He makes a total of 21 litres of paint. How much more blue paint does he need to add to the mixture so that the ratio of white paint to blue paint becomes 1:4?

W:B = 2:5 Total of 21 litres of paint. We want a ratio of W:B = 1:4 = 2:8
Therefore we must add 3 parts of blue paint
2 + 5 = 7 parts total7 parts = 21L1 part = 3L3 parts = 9L
Ther...

Answered by James B. Maths tutor
6108 Views

Calculate 3/4+3/4*5/7 ?

so we need to know the understanding of BODMAS, hoe to add fractions, how to multiply fractions, how to simplify fractions.Answer:9/7

Answered by Anand K. Maths tutor
1658 Views

Find the stationery points of x^3 + 3x^2 - 24x + 7 and determine whether the slope is increasing or decreasing at x=3.

i) We must differentiate the equation and set it equal to 0 to find stationery points:
dy/dx = 3x2 + 6x + 24=0 Note we can take out a factor of 3 x2+ 2x - 8=0 Fact...

Answered by Michael M. Maths tutor
1319 Views

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