Top answers

An ordinary, fair sided dice is rolled 480 times. How many times is the number 3 expected?

An ordinary dice has six sides. We have an equal chance to roll on any of these six sides. This gives us the probability of rolling a 3 (or any other number) as 1/6.Each roll is independent i.e the result of...
LP
Answered by Louis P. • Maths tutor
6948 Views

How do I solve a quadratic equation: x^2-5x+6=0

When solving a quadratic equation, you have two options. Take the general form ax^2+bx+c=0Method 1: Solution by FactorisingWhen the numbers involved look fairly simple, look for a way to factorise the quadra...
NC
Answered by Naomi C. • Maths tutor
4824 Views

Expand and Simplify: (x+2)(x+3)(x−3)

(x+2)(x+3)(x−3)(x 2 + 3x + 2x + 6)(x - 3) : Step 1 is to expand the first two brackets. (x 2 + 5x + 6)(x - 3) : Step two is to simplify the quadratic. x 3 -3x 2 +5x 2 -15x+6x-18 : Then expand the quadratic w...
AH
Answered by Alex H. • Maths tutor
10146 Views

How do I start my essay?

Your introduction should always be a few sentences long, and should address the question directly. A good example of a question is 'How does Shakespeare present the theme of ambition in Macbeth?' For this qu...
KB
7248 Views

Let n be an integer greater than 1. Prove that n^2 - 2 - (n-2)^2 is an even number.

To show a number N is even, we must be able to express it in the form N = 2x for some other whole number x. Let's try to manipulate the given expression to see if we can put it in this form. By expanding the...
SL
Answered by Sam L. • Maths tutor
18534 Views