Catherine paid $185.30 for an mp3 player. if the price paid includes a 9% sales tax, which of the following equations can be used to determine the price of the mp3 player before tax? (let x represent the cost of the mp3 player and y represent the total cost after tax.)

y = $185.30

x = the orignal cost minus 9% or .09. To increase an objects value by 9% you need to multiply by 1 + .09 or 1.09. So, x being increases by 9% would equal y or $185.30

1.09x = y

1.09x = $185.30

Divide both sides by 1.09

x = $170

the answer is:

the answer is:

to solve the problem, we need to remember the quotient of power property, it's defined by the following relation:

if we have a quotienf of powers that have the same base, we need to keep the same base and subtract the exponent of the denominator power to the exponent of the numerator power.

so, we are given the expression:

then, calculating we have:

hence, the answer is:

have a nice day!

no

step-by-step explanation:

answer