Answer:
x=2; the extraneous root x=42.
All the details are in the attached picture, the answer is marked with red colour.
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Y = -x - 4
Y = x
x = -x - 4
2x = -4
x = -2
Therefore y = -2
Length of bottom is four width is four height is also two
Top has a length of 2 height of three and a width of four
Six hundred three thousand four hundred seventy-eight
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➷ Work out the cost per gram
60/125 = 0.48
It costs 0.48 cents per gram
Multiply this by 100 to get the answer:
0.48 x 100 = 48
It would cost 48 cents
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