exam Maths Puzzle Numerical Ability

Which label describes the following?
3x + 6 = 10
Isnt that an Expression

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exam Other Question

A cone has an altitude of 15cm and a radius of 3cm. A right circular cylinder of radius r and height h is inscribed in the cone. Write h as a function of r. The number of men dying of AIDS (in thousands) since 1987 is modeled by y= 17.3 + 10.06(lnx), where x, represents the number of years after 1987. Use this model to predict the number of AIDS deaths among men in 2008. Round to the nearest hundres men.