The sales tax for an item was $21.50 and it cost $430 before tax.
Find the sales tax rate. Write your answer as a percentage.

5%

Step-by-step explanation:

To find the tax rate, take the amount of tax over the amount before tax

21.50/430

.05

Change this to percent form by multiplying by 100

5%

since we know that the two functions are equal, f (x) = g

(x), therefore when we equate the two equations the result should be similar to

3x = x – 4:

a. f(x) = 3x, g(x) = x – 4

equating the two functions:

3x = x – 4             (correct)

so we now got our answer (a)