If a ⊂ b, then which of the following describes the relationship between a and b?

a set a can have the same number of elements as set b.
b set b may have less elements than set a.
c the intersection of sets a and b must be the empty set.
d set b may have more elements than a does.

If the wwight of a package is multiplied by 7/10 the result is 65.8 find the weight of the package

Find the roots of the equation below. x^2 - 6 + 9 = 0

The u-drive rent-a-truck company plans to spend $13 million on 320 new vehicles. each commercial van will cost $25 comma 000, each small truck $50 comma 000, and each large truck  $80 comma 000. past experience shows that they need twice as many vans as small trucks. how many of each type of vehicle can they buy?