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Shampoo is sold in two sizes. 1) 500 ml for £1.98 2) 3 litres for £12.80 (now 15% off). Which is better value for money?

Firstly we need to work out the new price of the 3 litres of shampoo after 15% has been taken off. Let's use the three step method for percentages. 100% is £12.80 £12.80/ 100= £0.128 1% is £0.128 £0....

Answered by Francesca N. • Maths tutor

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How do you factorize a quadratic equation which has a coefficient of x^2 other than 1?

Factorise 6x²+ x - 2 = 0

Firstly, multiply the coefficient of x² by the last number:

6 x -2 = -12

Answered by Aleezeh A. • Maths tutor

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Kenny has £3200 in a savings account. After a year, the bank pays him interest increasing his balance to £3360. What percentage rate was applied to the account?

Kenny originally had £3200 After a year, he had £3360 £3360 - £3200 = £160 160/3200 = 0.05 0.05 x 100 = 5% Therefore, a 5% interest rate was applied to Kenny's account

Answered by Megan C. • Maths tutor

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