Hamid published a book of poems. He sold 35 copies in the first week for $10 per copy. He wanted to increase the price of
each book to increase his revenue. He found out that for every 50-cent increase, x, in the price per copy, the average number
of books he sold decreased by 2 per week.
Assuming that Hamid's revenue is found by multiplying the book price by the number of copies sold, create an equation in
standard form) to model his revenue.
Type the correct answer in the box.

After reading through the story problem, I ended up with this equation:

(35-2)(x+.5) =?

or

(35-2)(10+.5)=?

Explanation:

He sells 35 books for usual weeks. Since he is selling his books at $.50 more his average number of copies decreased by 2.

35-2 = 33

Next, we know that he adds $.50 for his price for each copy. If the price is $10 per copy than it looks like this:

$10+$.50= 10+.5

or if the price is not $10 it will be

$x+$.5= x+.5

y = -x^2 − 2.5x + 350

Step-by-step explanation:

y = (10 + 0.5x)(35 − 2x)

y = 350 − 20x + 17.5x − x^2

y = 350 − 2.5x − x^2

c

step-by-step explanation:

it isn't d, because the interquartile range is from 27-57. and the interquartile range is basically half the data, it's pretty obvious.

it isn't b, because like i said earlier, the interquartile range is from 27-57. 57-27 is 30. the real range has to be longer

not a either. although it looks like it, 3/4 of the data is not greater than 27. but if c is wrong than this should be correct

the correct answer is c, because 13 is the point in which the plot starts

answer is 144

step-by-step explanation: