The work of a student to solve a set of equations is shown:
equation a: y = 15 – 2z
equation b: 3y = 3 – 4z
step 1: –3(y) = –3(15 – 2z) [equation a is multiplied by –3.]
3y = 3 – 4z [equation b]
step 2: –3y = 15 – 2z [equation a in step 1 is simplified.]
3y = 3 – 4z [equation b]
step 3: 0 = 18 – 6z [equations in step 2 are added.]
step 4: 6z = 18
step 5: z = 3
in which step did the student first make an error

Step 2

Step-by-step explanation:

Where did the -3 from the first equation get simplified to?

Step 1: –3(y) = –3(15 – 2z)

Step 2: 3y = 15 – 2z

my acc plz

step-by-step explanation:

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: