65 is the asnwer hope i helped
Jon ran 21km (7+14 because robert ran 14 less so you add the 14 additional km to jon’s total)
we have
which is a cubic function.
and
.
from f(x) and g(x) we know that both are cubic and g(x) has shrink of 1 and up by 4 units in x axis .
Original bill is 100%/20% *5.8=29
(dollars)
Yes it is because 18÷6 is 3 and 6×3=18