Expand and simplify:
3(2a + 5) + 5(a-2)

In the given figure ar(adf) =ar(cda) and ar(cdf) = ar(cdf). show that abdc and cdfe are trapeziums.

An ulcer medication has 300 milligrams in 2 tablets. how many milligrams are in 3 tablets?

Tim's phone service charges $26.39 plus an additional $0.21 for each text message sent per month. if tim's phone bill was $31.64, which equation could be used to find how many text messages, x, tim sent last month?