Which expression is equivalent to 6+9a-3+6a?
a) 15a + 3
b) 15a - 3
c) 18a
d) 15a + 9

36 inches/second = yards/minute how many yards?

If the cost to mail a package is an initial $5 and $0.28 for every pound the total cost to mail a package was $11.27, how much did the package weigh?

Aproduction manager test 10 toothbrushes and finds that their mean lifetime is 450 hours. she then design sales package of this type of toothbrush. it states that the customers can expect the toothbrush to last approximately 460 hours. this is an example of what phase of inferential statistics