The $315 cost of the couch after tax, gives the cost before tax, <em>C</em>, as the following equation;

<h3>How can the cost before tax be expressed?</h3>
The cost of the couch with tax = $315
Let, <em>t</em>, represent the tax rate, and let <em>C</em>, represent the cost before tax, we have;
315 = C + C × t
Which gives;
- The cost of the couch before tax, <em>C </em>= 315/(1 + t)
Mathematically, we have the following equation;

Learn more about writing, and analyzing equations here:
brainly.com/question/7187454
#SPJ1
There are seven (7) friends.
The first friend to board can be any one of the 7. For each of them ...
The 2nd one to board can be any one of the remaining 6. For each of them ...
The 3rd one to board can be any one of the remaining 5. For each of them ...
The 4th one to board can be any one of the remaining 4. For each of them ...
The 5th one to board can be any one of the remaining 3. For each of them ...
The 6th one to board can be either of the remaining 2. For each of them ...
The 7th one to board is the last 1 standing.
(7 x 6 x 5 x 4 x 3 x 2 x 1) = <span>5,040</span>
<span>16 / 4^3 = 4^n
4^2 / 4^3 = </span>4^n<span>
4^-1 = 4^n
-1 = n or n = -1
answer
n = -1</span>
To answer this you will use the formula for finding area of a parallelogram.
A = bh
3 inches x 2 inches
A = 6 square inches per piece of paper
6 square inches x 15 = 90 square inches
90 in.² of paper is used to make 15 pieces.
Answer:
Step-by-step explanation: divide 7 by 3.5 and then the answer that u got u multiply by that number and thats your finale answer
MAKE SURE TO FOLLOW ME AND ANY HELP IM HERE ALWAYS FOR U ..