a math quiz consist of 30 questions. the first 20 questions are worth 4 points each. the last 10 questions are worth 7 points ea
ch. no points will be deducted for each wrong answer. Justin scores 124 points on a math quiz. how many of the first 20 questions and how many of the last 10 questions does he answer correctly?
2 answers:
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Answer:
You have to buy more than 20 books to make Cool Cover Bookstore club a better deal.
Step-by-step explanation:
Given that:
Fee charged by Fun Reads Bookstore = $40
Charges per book = $5
Let x be the number of books.
A(x) = 5x+40
Fee charged by Cool Covers Bookstore = $100
Charges per book = $2
B(x) = 2x+100
For making Cool Cover Bookstores club a better deal,
B(x) > A(x)
2x+100 > 5x+40
2x-5x > 40-100
-3x > -60
Dividing both sides by -3
Hence,
You have to buy more than 20 books to make Cool Cover Bookstore club a better deal.
