100%=9.99
×%=6.75
9.99x=100×6.75
9.99X=675
X=675/9.99
67.567% or 67.57
you could also say:
6.75/9.99=0.67567
0.67567×100=67.57%
so the markup is 100%-67.57%=32.43%
32.43%off




Now if

, then both

and

. Adding two positive numbers gives another positive number, so

. Why this is useful will be apparent shortly.
Back to the identity:

Factorizing the left hand side, we have

Now, any number squared will be positive, which means the right hand side is necessarily greater than 0.
We showed earlier that

. So we understand that we have

The only way to multiply a number by a positive number to get yet another positive number is to have the first number also be positive, which means

and from this it follows that

in the provided region.
The answer is 256.25
EXPLANATION
Let
represent the number.
Then, 
We cross multiply yo obtain,

We now divide both sides by 16.

This will give us,

Therefore the number is 256.26
Answer:
Step-by-step explanation:
it looks like it's approx. y= 70x + 20
Answer:
See attachment for graph
Step-by-step explanation:
Given

Required
The graph of the equation
First, we determine the range of y





















<em>See attachment for graph</em>