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Maths
GCSE

Factorize x^2 + 4x -5 and hence find the roots of the quadratic equation y = x^2 + 4x - 5.

First, identify the integer factors of the constant. In this case -5, has factors -1,5 and 1,-5. Now check to see if the sum of either pair is equal to the value of the coefficient of x. In this case, the...

Answered by Alexander W. Maths tutor
6397 Views

Calculate the gradient of this straight line

The gradient of a striaght line measures how much it changes when you move in one direction. For example when we move to the right in the x direction, the line goes down. The equation for finding the grad...

Answered by Tutor67677 D. Maths tutor
6324 Views

Solve simultaneous equations x + y = 3 and -3x + 5y = 7

The first equation can be multiplied by 3 to give 3x + 3y = 9. Then these two equations can be added by summing both left hand sides and both right hand sides to obtain the new equation 3x + 3y - 3x + 5y ...

Answered by Jonas V. Maths tutor
3122 Views

If Tom flips a coin 3 times, what is the probability the result are heads, heads, heads, or tails,heads, tails? (assuming we have a fair coin)

This question can be solved using a tree diagram. First we need to map out the two possible outcomes from the question:

H=heads T= tails. The first scenario is HHH, as the probability of H each tim...

Answered by Ross B. Maths tutor
3938 Views

Write 0.38 as a percentage and as fraction.

38% and 38/100.

Answered by Lauren F. Maths tutor
3030 Views

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