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Solve the equation log2(x + 3) + log2(x - 3) = 4

log2(x + 3) + log2(x - 3) = 4log2 [(x + 3)(x - 3)] = 4x^2 - 9 = 16x^2 = 25x = 5
Answered by • Maths tutor
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Work out the gradient and y-intercept of the straight line with points A(3,8) and B(-2,-7)

Y= mx + cFinding m : change in y/ change in x => (8--7)/(3--2) = 3Finding c : input a pair of coordinates => 8 = (3 x 3) + c .... c = -1y = 3x -1
KR
Answered by Kim R. • Maths tutor
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What are the conditions for an event to be modeled with the binomial distribution?

The event should be; mutually exclusive from the other outcome, independent from the other outcome (so its probability doesn't change ) and happen within a fixed number of trials . A good example would be th...
RK
Answered by Roy K. • Maths tutor
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Why does a 'many to one' function not have an inverse?

Because its hypothetical inverse would be 'one to many' which is not a function. This is because a single x-value would map to several y-values at the same time.
RK
Answered by Roy K. • Maths tutor
18966 Views

What is the difference between unconditional and conditional probability?

Unconditional probability is a measure of the liklihood of a particular outcome relating to a series of independent events, where the outcome of one does not effect the outcome of another. For example, consi...
OH
Answered by Oliver H. • Maths tutor
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