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Solve 6x^2+8x-8 = 0 using factorisation.

Factorise using a suitable method (eg product and sum) to find (6x-4)(x+2) = 0Hence x = 4/6 and x = -2.

Answered by Matthew S. • Maths tutor

2544 Views

There are 35 people in a group. x(x+1) of them have a blue car, 5x of them have a red car, 4 have a blue and a red car and 4x-8 do not have car. Work out the probability that a person who has a blue car, has a red car as well.

We see this question is about conditional probability. Because a person chosen at random from the group satisfies a 1st condition: they have a blue car. And after we know this, they have to satisfy a 2nd ...

Answered by Ana P. • Maths tutor

1965 Views

How can you add and subtract fractions with surds in them?

The square root sign can make fractions look a bit scary until you're familiar with it, that's the same with anything new! The important thing to remember is, the rules of algebra are the same

Answered by Daisy H. • Maths tutor

6381 Views

differentiate parametrically y=3t+4 and x=2t^2 +3t-5
first you differentiate both equations giving dy/dt = 3 and dx/dt = 4t+3
dividing dy/dt by dx/dt gives dy/dx and so the answer is 3/(4t+3)

Answered by • Maths tutor
2634 Views

what is the point of intersection between the lines 3y-4x=12 and 2x=2y+3
As these are simultaneous equations you will need to get a coefficient of either x or y on one side and then substitute it within the other equation. Using the second equation you can divide by 2 leading ...
Answered by Benedict G. • Maths tutor
2037 Views

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Top answers

Solve 6x^2+8x-8 = 0 using factorisation.

There are 35 people in a group. x(x+1) of them have a blue car, 5x of them have a red car, 4 have a blue and a red car and 4x-8 do not have car. Work out the probability that a person who has a blue car, has a red car as well.

How can you add and subtract fractions with surds in them?

differentiate parametrically y=3t+4 and x=2t^2 +3t-5

what is the point of intersection between the lines 3y-4x=12 and 2x=2y+3

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