Given that a(a+2b) = 104/3, b(b+2c) = 7/9, and c(c+2a) = -7, find |a+b+c|.

Scrub a dub toothbrushes are $4.00 each. there is a 10% discount, but there is also a 6% sales tax after the discount is applied. what is the new price after tax? round to the nearest penny

How long must $542 be invested at a rate of 7% to earn $303.52 in interest? in a easier way

The following hormone had their receptors in the cell membrane except a-insulin b-tsh c-gh d- cortisol