Aiden wants to ensure he has enough cash to purchase a $34 couch so he asks a clerk what the total will be
with sales tax included. The clerk tells him the total will
be $40. What is the sales tax percentage? Explain please!

Approximately 18%

Step-by-step explanation:

1. Subtract the cost with tax by the cost without tax.

40-34=6

2. Create a proportion:

=

3. Cross Mutliply to get:

34x=600

4. Divide 34 by both sides to get

x=17.64...

The sales tax is approximately 18%

i think it's ф or x=6,-6

step-by-step explanation:

-x^2=-36

x^2=-36

ф

or

if you mean by : -(x^2)=-36

it'll be: x^2=36

x=6,x=-6

hope it'll ! have a good day!

you for asking!