Answer:
21
Step-by-step explanation:

subtract 3t from both sides

multiply both sides by 3

so 6t = -21
C=0.5x + 10
Where:
C = total cost of printing
x = number of business cards printed
0.5 = variable cost of printing, this cost depends on the number of business card
10 = fixed cost of printing, this cost stays the same regardless of the number of business card printed.
C = 0.5x + 10 ; derive the formula of x.
C - 10 = 0.5x
(C - 10)/0.5 = x
Answer:
2
w
^2
−
28
w
+
c
Step-by-step explanation:
That's what I got use math(way)to see it

There are 4 teams in the contest.
Hope this helps. - M