If elephant grass grows 2 3/4 inches a day, how many inches will it grow in 6 days?

In 1 day, the grass grows 2 3/4 inches or 11/4 inches.
In 6 days, the grass grows (11/4 X 6) inches
= 33/2
= 16 1/2
= 16.5 inches
Ans: The elephant grass grows 16.5 inches in 6 days.

(a) Carl earns $45 per 3 hours as given. To find the amount he earns per hour, we simply divide:

$45/3 hours = $15/hour

(b) To see how much Louis makes per hour, simply plug in 1 for the hours value x:

y = 12(1 hours)

y = $12/hour

Thus Carl makes more than Louis.

(c) The equation of Carl's dollars per hour is similar to Louis':

y = 15x 

where x is the number of hours he works and y is the number of dollars he earns. Plug in whole number values of hours for x and plot the points (x, y) on a graph.