Salina's age is one-quarter the age of her aunt. If a represents her aunt's age, which expression represents Salina's age?
4a
a-4
a+4
A over 4

If 1 km = 0.621 miles, how many miles are in a centimeter

Which of the following are accepted without proof in a logical system? check all that apply.

1jessica's home town is a mid-sized city experiencing a decline in population. the following graph models the estimated population if the decline continues at the same rate. select the most appropriate unit for the measure of time that the graph represents. a. years b. hours c. days d. weeks