Angelica is buying 5 tickets to the school musical. tickets cost $7 each.

if c represents angelica's total cost for tickets, which equation below is correct?

c = 5
c = 5 + $7
c = (5)($7)
c = $7

Kapil needed to buy a long wooden beam. he went to two sawmills that each charge an initial fee plus an additional fee for each meter of wood. the following equation gives the price (in dollars) of a wooden beam from the first sawmill as a function of its length (in meters). p = 5+20xp=5+20x

Find an equation of the line perpendicular to the graph of 28x-7y=9 that passes through the point at (4,1)

Complex numbers multiply √-4 * √-25 and show all intermediate steps. alternative notation is sqrt(-4) * sqrt(-25).