63. grace bought a dress, d, that was 45% off the regular price, r.
a write an equation that represents this situation.
b the price of the dress before the 45% discount was $85.00.
after the discount, a 9% sales tax was added to the final sale
price. calculate the final cost of grace's desk. show how you
found your answer.

A.

r - (r x .45) = d (The discounted price of the dress.)

B.

85 - (85 x .45) = 46.75

Now to find the final cost.

46.75 + (46.75 x .09) ~ 50.96

The final price is $50.96.

Hope this helps!

If it does, it would help a lot if you make me brainliest.

since your problem is x^4 = 81, what you have to undeo is the "to the fourth power" part.

the inverse (opposite operation) of "to the fourth power" is "to the fourth root".

  (x^4) ^ ¼   = 81 ^ ¼  

  81 = 3^4     so (3 ^ 4) ^ ¼   =   3 ^ 1   = 3

by hand: (3 ^ 4) ^ ¼   =   3 ^ (4 x ¼) = 3 ^ 1   = 3   (when you take a power to a power, multiply the exponents.)

or, do it by calculator. one way of finding the fourth root is to use ^ (1/4)

step-by-step explanation: