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Nadia has £5 to buy pencils and rulers. Prices: Pencils - 8p each Rulers - 30p each She says, "I will buy 15 pencils Then I will buy as many rulers as possible With my change I will buy more pencils." How many pencils and how many rulers does she

£5 = 500 p 1 Pencil = 8p1 ruler= 30p If she is buying 15 Pencil , it will be= 8 *15= 120p, 380 p remains ( 500p-120p= 380p) 360p / 30 = 12 rulers this will give you a change of 20 p , 20/8 ( price for a penc...
KI
Answered by Khansa I. • Maths tutor
7946 Views

Solve x^2-x-12=0

x 2 - x - 12 = 0Factorise to get (x-4)(x+3)=0This gives (x-4)=0 or (x+3)=0So x=4 or x=-3
HS
Answered by Hursh Singh A. • Maths tutor
3125 Views

We are given a right angled triangle with one side of unknown length. The shortest side is 3cm long, and the longest side is 5cm long. Calculate the remaining side.

This is a classic question testing your understanding of Pythagoras' Theorem. This is an equation which shows us the relationship between the 3 sides of a right angled triangle : a 2 + b 2 = c 2 . a and b ar...
SM
Answered by Sean M. • Maths tutor
3717 Views

Solve the simultaneous equations 5x + y = 21 and x- 3y = 9

There are different ways to approach solving a simultaneous equation question. For this one I recommend using substitution for this one where you insert one equation into the other. First take the equation x...
GB
Answered by George B. • Maths tutor
3532 Views

Solve x^2+10x-3=0 by completing the square, simplify your answer.

x 2 +10x-3=0(x+5) 2 -(5) 2 -3=0 (half the 'x' coefficient and put it in the bracket with x to be squared, then take away that new number squared followed by the original constant)(x+5) 2 -25-3=0 (square the ...
TD
Answered by Tutor575114 D. • Maths tutor
5039 Views