Top answers

solve for x: (x-2)(x+3)=2(2x+11)

expand the brackets to get x 2 -2x+3x-6=4x+22 bring all the terms to one side x 2 -2x+3x-6-4x-22=0 (remember:if you do something to one side, do the same thing to the other! e.g. -4x on both side) gather all...
JR
Answered by Jack R. • Maths tutor
5936 Views

How would you define the concept of Parliamentary Sovereignty?

The most common explanation of the idea of sovereignty comes from Dicey, who saw sovereignty as the idea that Parliament can make or unmake any law it chooses, with unlimited discretion. This means that futu...
IC
Answered by Iona C. • Politics tutor
2707 Views

A curve is defined by the parametric equations x=t^2/2 +1 and y=4/t -1. Find the gradient of the curve at t=2 and an equation for the curve in terms of just x and y.

To find the gradient of the curve at t=2 we need to find an expression for dy/dx and then substitute in for t=2. We can make use of the chain rule to find this expression because dy/dx = (dy/dt)/(dx/dt) and ...
SC
Answered by Steven C. • Maths tutor
9274 Views

Solve the inequality. x^2 + 2x -15 > 0

To solve the inequality, it must first be factorised. This could be done by the ‘complete the square’ method. However in this example it is more efficient to find a pair of numbers that multiply to give the ...
EF
Answered by Elizabeth F. • Maths tutor
13498 Views

What is a food chain we might see in the UK?

A food chain demonstrates what different species of animals present in an ecosystem eat, and are eaten by. The start of the food chain is a producer - an organism which makes food. This is generally a plant,...
CT
Answered by Caroline T. • Biology tutor
12883 Views