11
an electrician charges a call-out fee of $40 and $60
per hour.
a. write an expression for the total cost if the
electrician works for h hours
b. how much would it cost if a particular job took
3 hours?
c. use your expression to work out how many hours
the electrician worked for if he charged $400 for a
particular job.

a. 60(h)+40=

b 60(3)+40=

180+40=$220

c. 400=60(h)+40=

  360=60(h) *divide 60 on each side*

   6=h, 6 hours

18

step-by-step explanation:

draw the shape and you will see that f and k are actually at adjacent vertices (points of the hexagon that are neighboring).   so find the distance between (1,2) and (4,2).   that is easy since (1,2) and (4,2) is just a vertical distance to count, which is 3.   it is a regular polygon which means all sides are congruent.   you have 6 sides (hexa) so multiply 6 by 3 to receive 18.