What is 28637363636336 times 83838383828 plus 48484884848484848?

The center of a circle represent by the equation (x+9)^2+(y-6)^2=10^2 (-9,6), (-6,9), (6,-9) ,(9,-6)

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

Does anyone know how to solve and graph this: 4 + | a + 2 | < 7the only part i don't get is the "4 +"