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How many people chose A?

In a survey people had to choose either A, B, C or D. The percentage of people that chose B, C and D are shown here: B- 25% C- 35% D- 30% You are also told that 150 people chose B. How many chose A? So first...
RB
Answered by Rheanne B. • Maths tutor
6399 Views

Expand and simplify (5x – 2y)(3x – 4y)

Expand and simplify (5x – 2y)(3x – 4y) In this question, we are asked to 'expand' out the brackets. What this means is we need each term in one set of brackets (5x and -2y) to be multiplied by each term in t...
JL
Answered by Jamie L. • Maths tutor
11218 Views

How do I solve simultaneous equations?

Let's use an example. x+y=6 2x+3y=14 Find the values of x and y. When I was kid back then, I was always wondering why are equations important? Well, for me, its because we want to be precise with our asnwers...
WH
Answered by Wilson H. • Maths tutor
6124 Views

What is the Pythagoras Theorem?

The Pythagoras Theorem equation is: a 2 + b 2 = c 2 It is used to calculate an unknown side of a right angled triangle. a, b and c represent sides of the triangle and you can rearange the formula to find whi...
NB
Answered by Natasha B. • Maths tutor
5416 Views

How do I simplify the equation 4x + 5x -2 - 2x + 7?

To simplify an equation the x terms can be collected together to give: 4x + 5x - 2x = 7x The numbers can be collected together to give: -2 + 7 = 5 Which then when put together makes 7x + 5
NB
Answered by Natasha B. • Maths tutor
6941 Views