What is the question marks for?
The First One Answer is
x•(1+xy+x^2y)
In order to get an 81 average,
the student has to get 81x5=405
71+96+90+73+?=405
330+?=405
405-330=75
he needs to get an 75
The local library lends an average books per day = 68.24
We know there are 7 days in a week
To find the the average number of books lent to readers in a week, we multiply the number of days in a week by average number of books per day.
let x be the average number of books per week
x= 68.24 * 7
x= 477.68
The local library lends an average of 477.68 books to readers every week.
