At what point will the lines x = -21 - 2y and x = -39 - 4y intersect?​

The co-ordinates of the intersection are simply the solution of the simultaneous set of equations.

x=4y-8

(1/2)x+ y =11

Clear fractions first: x + 2y=22

Substitute: 4y-8+ 2y = 22  => 6y = 30.

You finish it!

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amount of oatypop that contains the prize = 40%

amount   of oatypop which doesn't contain the prize = (100-40)=60%

probability that hannah will win a prize

    = s +f s +f f s+ff   f s+ff f f s+ infinity.where f= failure,s= success

=   or 60%

probability that hannah only has to buy 3 or less boxes before getting a prize= (s) and ( f s) and (ff s) and (f f f s)

        = = 87.04 %  

step-by-step explanation: