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Solve the inequality x^2 + 5x -24 ≥ 0.

There are a few different ways to approach this problem but the simplest and most easy to visualise solution comes from sketching the curve y = x²+ 5x - 24 and identifying the range of x-value...

Answered by Owen W. • Maths tutor

7298 Views

Mark buys a computer. A VAT of 10% is added to the price of the computer. He pays £246. What was the original price of the computer before VAT was added?

We want to find the original price of the computer.We know when 10% of the price was added to the computer it costs £264.So £264 is equal to the original price plus 10% of the original price.To find 10% o...

Answered by Lisa S. • Maths tutor

3723 Views

Express 56 as the product of its prime factors

2×2×2×7 - for complete method to find prime factors; could be shown on a complete factor tree.

Answered by Nanditha S. • Maths tutor

2621 Views

Work out the value of 81^(-1/4) (Non-Calculator)

To answer this question, we have to think about our power rules and use them to slowly simplify this complicated expression:81^-1/4 = ((81)^1/2)^-1/2 (Because ((x)^y

Answered by Reece P. • Maths tutor

9994 Views

Use Implicit Differentiation to find dy/dx of the following equation: 3(x)^2 + 8xy + 5(y)^2 = 4

(This is a common question in C4, the "hardest" module of the old A level)When differentiating we consider each term one at a time:Differentiating 3x² simply gives us 6x Differentiati...

Answered by Reece P. • Maths tutor

3862 Views