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Area of a circle = π r²
r = (1/2) d = (1/2) * 140 = 70
area = π * (70)²
= 4900 π cm²
We first need to find dy/dx and we use the fact that dy/dx = dy/dt * dt/dx. So we have dy/dt = -6sin(3t) and dx/dt = 12cos(3t). Substituing these in we have dy/dx = -6*sin(3t)1/(12cos(3t...
Following the laws of BIDMAS, the bracket needs to be multiplied first (instead of adding 2y and 3y first):
2y + 15y2 + 9y
Simplify by addition of the y's...
This is a simple GCSE inequality question. The aim is to solve the equation for x - get x on its own on the left side of the equation.
Step 1. We think of equations as balanced weighing scales, so...
To solve these equations we must make them equal to eachother. This gives us x2+4x+6=x+4, we must then subtract the 'x+4' fro...
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