Search our library of Maths questions

Top answers

Maths

All levels

A curve has equation y = (x-1)e^(-3x). The curve has a stationary point M. Show that the x-coordinate of M is 4/3.

(In the following answer, y' denotes dy/dx, i.e. the derivative of y with respect to x, where y is a function of

Answered by • Maths tutor

3579 Views

How do I find the reultant force acting on an object sitting on a slope?

Firstly, you should consider what forces are acting on the object and in what direction. It helps to draw a large diagram to label. In most questions, the forces should be told to you. It helps to keep in...

Answered by • Maths tutor

2582 Views

Factorise 2x^2 - 7x -4

2 x -4 = -8 -8 x 1 = -8 (2x^2-8x)+(x-4) 2x(x-4) + 1(x-4) (2x+1)(x-4)

Answered by Nicola M. • Maths tutor

2760 Views

A right-angle triangle has a hypotenuse of 8cm and an angle of 30 degrees. What is the opposite's length?

sinx = o/h sinx x h =o sin30 x 8 = 4cm The opposite is 4cm

Answered by Nicola M. • Maths tutor

2876 Views

Solve the simultaneous equations 5x+2y=13 and x-2y=5.

5x+2y=13 + x-2y = 5 6x =18Firstly you need to either add or subtract one equation from the other. The way to decide this is to either focus on the x's or the y's. The trick to solving these simult...

Answered by Amy J. • Maths tutor

4578 Views