Which property of real numbers justifies the work between step 4 and step five

Suppose i flip two identical coins. what is the probability that i get one head and one tail?

Alogical argument that is presented in graphical form using boxes and arrows is called?

Noel is hoping to make a profit (in $) on the school play and has determined the function describing the profit to be f(t) = 8t – 2654, where t is the number of tickets sold. what does the number 8 tell you?