Search our library of Maths questions

Top answers

Maths

All levels

Solve 7x-5>22-2x

9x>27X>3

2959 Views

Find the first and second derivative of f(x) = 6/x^2 + 2x

We can rewrite the function to eliminate the annoying 1/x^2 expression by knowing this can also be expressed by x^-2.f(x) = 6x^-2 + 2xNow we can differentiate this function term by term, first 6x^-2. We k...

Answered by • Maths tutor

2957 Views

Expand the following expression and simplify: (3x+2)(4x+5)

12x² + 15x + 8x + 10 = 12x² + 23x + 10

Answered by Priscilla D. • Maths tutor

4423 Views

A car depreciates at 8% per year. The initial price of the car is £25,000. How much will the car be worth after 4 years? After how many years will the car be worth less than £14,000?

This problem is all about compound interest except this time the value is going down not up. To increase a value by 8% you would multiply it by 1.08 as 8% is 0.08 (1+0.08). To decrease a value however you...

Answered by Hannah T. • Maths tutor

7152 Views

The formula v = u +at gives the final velocity of an object as it accelerates. If v= 35, a=4 and t=5 then find u

First off, you would start by substituting in the numbers that you already know.
Therefore you get: 35 = u + (4 x 5)
Remembering BODMAS you would then look at the equation and solve the bracket...

Answered by Hannah G. • Maths tutor

9483 Views