An award-winning author appeared at an autograph- signing reception at a local bookstore. The equation
B=-d^2 + 14d + 12 models the number of her
books, B, sold at the store d days after her signing
reception.
a. How many days after the author's appearance at the
bookstore will the store sell the maximum number of
copies of her book?

question 1 is 8, question 2 is 9, question 3 is 24

step-by-step explanation:

now, the numbers they give you at the top are the key. from there, you just have to plug and chug! let's try 1, 2, and 3!

key: a=3, b=5, c=6

1. a+5

remember, a=3, so we plug that in to get 3+5=8

2. 15-c

c=6, so we plug that in to get 15-6=9

3. 4b

b=6, so we plug it in to get 4*6=24

time to try the rest on your own! if you put the answers below in a comment, i'll check them for you!

ion

step-by-step explanation:

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