A girl read a book that had 1,159 pages. She read 72 pages on the first day. She then read 40 pages per day until she finished the book. Which equation could be used to find the number of days, d, it took her to read the book?

1,159=40d+72

(1159-72)÷40= 27 it would take her 27 days

Step-by-step explanation:

if she initially read 72 you would subtract that from the original number of pages she had to read, then divide the number that's left with how many pages she read a day after that which is 40. to get a total of 27 days to read

the discriminant is 64 + 4*1*12 = 112

this is prime.

step-by-step explanation: