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Maths
GCSE

1. factorise x^2 - 9 Level 6 KS3, 2. Rearrange a (q-c) = d to make q the subject

1.Here the first task in this is to be able to identify the form of this quadratic polynomiala^2 - b^2This format is called the difference between two squares When you ge...

DO
Answered by Devante O. Maths tutor
4616 Views

The point P(-3,9) belongs to a line intercepting the origin. Find the equation of the line.

We are told that the line passes through the origin O (0,0) and the point P (-3,9). First we need to find the gradient of the line m; this is given by m = (change in y)/(change in x), hence m = (9-0)/(-3-...

VB
Answered by Valeria B. Maths tutor
3218 Views

Solve algebraically the simultaneous equations: x^2 + y^2 = 25 and y - 3x = 13

Firstly we should look at the question and notice that the two possible methods are substitution or elimination. We should then notice that since one equation is a quadratic and the other linear, then the...

AS
Answered by Aviv S. Maths tutor
3169 Views

There are 5 red balls and 7 green balls in a bag. A ball is taken from the bag at random and not replaced. Then a second ball is taken from the bag. What is the probability that the 2 balls are the same colour?

Initially, there are 12 balls in the bag. Therefore the chance of the first ball being red is 5/12 and green is 7/12. The probabilities of the second ball are dependent on the first ball, as it is removed...

SL
Answered by Stanley L. Maths tutor
10197 Views

What is 90 million in standard form?

1 million = 1,000,00090 million = 90,000,000Place your decimal place after the 9 as standard form only has numbers 1-10 as the first number, otherwise it means this number can be divided by or multiplied ...

AY
Answered by Abbie Y. Maths tutor
16869 Views

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