An mp3 player costs $40, and a sales tax of $2.40 is added to the cost. what is the sales tax rate? (answer in %)

How do you use the elimination method for this question? explain, because i really want to understand!

Asquare has a perimeter of sixteen centimeters. what is the length of each of its sides? a. 8 cm c. 9 cm b. 4 cm d. 10 cm select the best answer from the choices

Given the equation y − 4 = three fourths(x + 8) in point-slope form, identify the equation of the same line in standard form. −three fourthsx + y = 10 3x − 4y = −40 y = three fourthsx + 12 y = three fourthsx + 10