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y is proportional to x 2 so this means y = A*x 2 for some constant A. When y = 75, x = 5. Put these values in the formula above to find A: 75 = A*25 75/25 = A A = 3 So y = 3x 2

Since the diameter is 130cm, the radius is half of this, so it is 65cm Area is Pi radius 2 . This means the area is Pi (65cm) 2 This means the area is Pi*4225cm 2

Take for example, the equation 13a + 6a 2 = −6 rearrange the questions into the form ax 2 +bx+c=0 6a 2 + 13a + 6 = 0 method 1: cross-multiplication method you use the cross multiplication method to find the ...

This is the full question: There are n sweets in a bag. 6 sweets are orange. The rest of the sweets are yellow. Hannah takes a sweet out of the bag at random. She eats the sweet and then takes another at ran...

To work out simultaneous equations, the aim is to remove one letter from the equations, i.e. Remove the y's so you have only x's and numbers (or vice versa). One way to do this is to get the coefficient in f...