code class$=$"asciimath"$>,$P$=($m$^(3))/(2-$m$).$ When m$=-2,$ the value of P is $($A$)-2($B$)(-6)/(4)($C$)(6)/(4)($D$)2$ If a$*$b$=($a$)/($b$)-1,$ then $7*28=($A$)-(3)/(4)($B$)(1)/(4)($C$)3($D$)4$ If $5(2$x$-1)=35,$ then x$=($A$)-4($B$)(1)/(4)($C$)3($D$)4$ John has x marbles and Max has twice as many marbles as John. Max gives John $5$ of his marbles. How many marbles does John now have? $($A$)$ x$+5($B$)$ x$-5($C$)2$x$-5($D$)2$x$+5$ When $8$ is subtracted from a certain number and the result is multiplied by $3$ the answer is $21.$ What is the original number? $($A$)1($B$)3($C$)10($D$)15$ How many kilograms are there in one tonne? $($A$)10($B$)100($C$)1000($D$)10000$ The volume, in cm$^(3),$ of a cube of edge $3$ cm is $($A$)9($B$)18($C$)27($D$)54$ A car travels $80$ kilometres in $2(1)/(2)$ hours. What is its speed in kilometres per hour? $($A$)6($B$)32($C$)82\mathrm{.}5($D$)200$