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harkovskaia [24]
3 years ago
14

The cost of item A is $8 and the

Mathematics
2 answers:
yKpoI14uk [10]3 years ago
7 0

Answer: the number of item A that you sold is 11

the number of item B that you sold is 2

Step-by-step explanation:

Let x represent the number of item A that you sold.

Let y represent the number of item B that you sold.

The total number of item A and item B sold is 13. This means that

x + y = 13

The cost of item A is $8 and the

cost of item B is $4. The total amount if money made is $88. This means that

8x + 4y = 88 - - - - - - - - - -1

Substituting x = 13 - y into equation 1, it becomes

8(13 - y) + 4y = 88

104 - 8y = 88

8y = 104 - 88 = 16

y = 16/8 = 2

x = 13 - y = 13 - 2 = 11

melisa1 [442]3 years ago
5 0

Answer:

4 of item A, and 9 of item B

Step-by-step explanation:

Let x represent the number of item sold in A

Let y represent the number of item sold in B

If the total number of item sold is 13. This implies

x + y = 13

The cost of item A is $8, the cost of item B is $4 and if the total amount of money made is $88, this implies

8(x) + 4(y) = 88 (Substitue x = 13 - y)

→ 8(13 - y) + 4y = 88

→ 104 - 8y + 4y = 88

→ 4y = 16

→ y = 4

If y = 4, then x = 13 - y = 9

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Mr. Zelman gave 400 books to his nephew

<em><u>Solution:</u></em>

Given that, Mr. Zelman wants to give 50% of his comic book collection to his nephew Alex

Mr. Zelman has 800 comic books

Number of books with Zelman = 800

Mr. Zelman wants to give 50% of books to Alex

Number of books given to nephew = 50 % of books of Zelman

Therefore, we have to find 50 % of 800

\rightarrow 50 \% \text{ of } 800

\rightarrow 50 \% \times 800\\\\\rightarrow \frac{50}{100} \times 800 = 400

Thus he gave 400 books to his nephew

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