Top answers

How to factorise equations, or expand factorised equations?

Factorising x 2 -100: As there is no common element in x 2 or 100, we know this must consist of two sets of brackets not just one. we know both brackets must contain and x, and that which ever two numbers mu...
HH
Answered by Harleen H. • Maths tutor
3453 Views

How to find the equation of a line from a graph?

Location of t wo points that lie on the line is needed to define an equation of the line. The general equation of a line is in the form y = mx + c , where m is the gradient of the line and c is the y coordin...
TK
Answered by Tomas K. • Maths tutor
3419 Views

If side A is 3m and side B is 4m, what would be the length of the remaining side C?

If side A is 3m and side B is 4m, what would be the length of the remaining side C? A = 3m ; B = 4m ; C =?Use Pythagoras Theorem to give the equation: A 2 + B 2 = C 2 Rearrange:(A 2 + B 2 ) 1/2 = C Because I...
HC
Answered by Harry C. • Maths tutor
6259 Views

If I toss a coin 3 times what is the probability of it landing on heads at least once?

The probability of getting heads at least once is the same as saying the probability of getting heads: exactly once, exactly twice or exactly three times. This is also 1 minus the probability of getting head...
JV
Answered by Joseph V. • Maths tutor
6349 Views

Prove that n(n+5) + 2(n+3) is always a product of two numbers with a difference of 5.

n(n+5)+2(n+3) = n 2 +5n+2n+6 = n 2 +7n +6 = (n+6)(n+1) = (n+6) x (n+1). The difference between (n+6) and (n+1) is 5, so this is a product of two numbers with a difference of 5.
EG
Answered by Eleanor G. • Maths tutor
4770 Views