Answer: 
Work Shown:
This can be rewritten into 
Nice to know how long parallelogram is 72 meters :)
Answer:
y=45-3x, where x=# of days, y=number of hours left, and 45=total # of hours.
Step-by-step explanation:
hours left= total - hours/day
we want y, so:
y=45-3x is the right answer
Answer:
R = 3.6
A = 2
Step-by-step explanation:
R is inversely proportional to A
....which means that....
; R = k/A.....(where k is a constant that does not change)....
;If R = 12 and A = 1.5....then k = 18..
obtain k,by substituting the values into the equation...k = RA
a) If A = 5....then R = 18/5....
; Ans..., R = 3.6
b) If R = 9....then A = 18/9
;Ans..., A = 2
B. The sign of the product is negative because a positive mutiplied by a negative is a negative
