Top answers

Maths
GCSE

Expand and simplify (3x^2 + 2)(2x + 5) – 6x(x^2 – 3)

First, multiply out 6x(x^2 - 3) so that it becomes – 6x^2 – 18xThen, multiply (3x^2 + 2) and (2x + 5) so that it becomes 6x^3 + 15x^2 + 4x + 10Add the two results above: 6x^3 + 15x^2 + 4x + 10 – 6x^3 – 18...

Answered by Ancel B. Maths tutor
7331 Views

How do you calculate the sum of all internal angles of a regular polygon?

Use the formula (n-2)*180 where n is the number of sides on the polygon.

Answered by Ben C. Maths tutor
2393 Views

The equation of the line L1 is y=3x–2. The equation of the line L2 is 3y–9x+5=0. Show that these two lines are parallel.

If two lines are parallel, then they will have the same gradient. The gradient of the curve is represented by m in the equation y=mx + c. For this question, if L2 is parallel to L1, m will therefore equal...

Answered by Sophie A. Maths tutor
2399 Views

Solve the equation 4(3x-2)=2x-5

4(3x-2)=2x-5
Expand the brackets: 4(3x)-4(2)=2x-5 ---> 12x-8=2x-5Collect like terms, but beware of sign changes: 12x-2x-8=-5 (subtract 2 from both sides of the equation) -----> 10x...

Answered by Hibban R. Maths tutor
4584 Views

A ball of mass 10kg is dropped from a height of 50m, if the work done against drag is 500J what is the speed of the ball immediately before impact with the floor? (g=10N/Kg)

To solve this problem we will use the principle of conservation of energy. The gravitational potential energy of the ball at the maximum height must be equal to the kinetics energy at the bottom plus the ...

Answered by Ali Reza N. Maths tutor
3383 Views

We're here to help

contact us iconContact usWhatsapp logoMessage us on Whatsapptelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo
Cookie Preferences