the total cost of 8 pens and 9 books is $30.05. if the cost of a pen is $a, and a book is .90 MORE expensive. find A. Give your

Question

Vsevolod [243]

2 years ago

6

the total cost of 8 pens and 9 books is $30.05. if the cost of a pen is $a, and a book is .90 MORE expensive. find A. Give your

answer in two decimal places.

Mathematics

2 answers:

AysviL [449] · Answer 1 · 2022-08-14T01:59:46+03:00

Answer:

2 Answers By Expert Tutors ... Let's set x = cost of books and y = cost of pens. ... In algebra, this can be written as x + y = 18. ... Using x and y, we get 1 book and 2 pens costs $21, or x + 2y = 21 ... The pen must cost $3 because we are adding $3 to the total when we ... Please provide a valid phone number.

Step-by-step explanation:

Kazeer [188] · Answer 2 · 2022-08-14T04:18:18+03:00

Kazeer [188]2 years ago

4 0

A= 2.74375 or just 3
Books= $8.10
Pens= 3 or 2.7475