Answer:
The multiplier is 1
specifically:

Step-by-step explanation:
Let the multiplier be k
Then,

We multiply both sides by 7/5


We can simplify this further to get 1.
This implies that:

Hence the multiplier is 1.
Yo can download the App photomath and it shows you how to divide step by step long numbers
You use the 20% coupon first because it's a percentage of the total amount. You don't want to lower the total amount before using it.
20% of 40$ is 8$ off
20% of 35$ is 7$ off
use the 20% then the -5$
Well to find the angles, simply see what must the angles be, to equal to 180 or 90 degrees. So we know the angle between C and D would be 90 degrees, so will the angle between A and C. The angle between B and A and the angle between B and C must give us a total of 90 degrees, so that means each would be 45 degrees. As 45 + 45 = 90. Also I would assume that angle between D and F would also be the same as between B and A which would be 45 degrees. Finally the angle between A and F would be the difference between 180 and 45 degrees. So it would be 180 - 45 = 135 degrees.
It is a function. There is nowhere on the graph where the vertical line passes through the graph more than once.