Find the number of terms common to the two A. P.'s 3,7,11,,407 and 2,9,16,,709

What are the measures of ∠a, ∠b, ∠c and ∠d? explain how to find each of the angle measure.

Hiroaki wants to find 3 3/4 - 7/8 explain why he must rename 3 3/4 to do the subtraction.

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?