solve for the unknown: 3^x=9^x+5, 27^4x=9^x+1, 5^x=25^3x+5.

Boris needs to buy plastic spoons. brand a has a box 42 spoons for $2.37. brand b has a box of 72 spoons for $3.57. find the unit price for each brand. then state which brand is the better buy based on the unit price. round your answer to the nearest cent.

What is always true about a positive integer raised to a negative odd power?

Determine the area of a triangle with (see picture below)