Answer:
28080$
Step-by-step explanation:
there are 52 weeks in a year.
15x10= 150
150x52=7800
13x30= 390
390x52= 20280
20280+7800= 28080
The relationship between the cost of books and pens is an illustration of linear equation.
The linear equation is (a) 
From the question, we have:
x exceeds 2 times y by 10
Rewrite as:
x exceeds 2y by 10
Exceed means plus (+)
So, we have:

Equate the above equation to 0

Hence, the required equation is (a) 
Read more about linear equation at:
brainly.com/question/11897796
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