book
Maths Puzzle
Numerical Ability
A dormitory now houses 30 men and allows 42 square feet of space per man. If five more men are put into this dormitory, how much less space will each man have?
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book Other Question
A man goes into a grocery store and buys a grapefruit and a toy ball. A 7% tax is applied to the price of non-food items. If the total bill is $5.15, including $0.18 in tax on the toy ball, what are the prices of the grapefruit and the ball?
please simplfy this
(4x^3-6x^2+5)-(x^2+7x^2-8x-2)