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Firstly expand the brackets to make (y+3)(y+3)Next I find it easy to remember that you don't times anything together that's in the same bracket when expanding. So - y x y = y^2y x 3 = 3y3 x y = 3y3 x 3 = ...

The four elements are star products, cash cows, problem children and dogs. Star products have a high market share in a fast growing market, cash cows have a high market share in a slowly growing market, p...

assign each variable to a value in s = ut + 1/2at²u = 2m/s t=0.2sa=-9.81m/s²so s = (2 x 0.2) + 1/2(-9.81)(0.2)²so s =

Multiply the second equation by 2 so that the coefficients of y are equal.(4x+y=14) x2 = (8x+2y=28)Now subtract the first equation from 8x+2y=28.(8x+2y=28) - (3x+2y=13)and you get 5x=15.Divide both sides ...

In situations like this I would always find it best to draw a diagram with all the information we know labelled on it. Firstly, however, notice that our measurements are in different units. You can conver...