
The given triangles are similar by ~
1992.1875
1500/64000= 0.0234375
0.0234375 x 85000=1992.1875
easy
5% is .05 two decimals to the left
55 x .05 = 2.75
$2.75 is your sales tax
55+2.75=$57.75
The additive inverse of a number a is the number that's added to yields zero