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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]2 years ago
5 0

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]2 years ago
4 0
A= 2.74375 or just 3
Books= $8.10
Pens= 3 or 2.7475
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7 0
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