Pregunta
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There are \( x \) number of girls in Basic 8 of a school. The number of boys in the class is 8 more than the number of girls. The number of girls in Basic 9 of the same school is 4 less than the number of girls in Basic 8 and the number of boys in Basic 9 is twice the number of boys in Basic 8 . In a given speech and price given day, each learner in Basic 8 was given \( y \) books and each learner in Basic 9 was given twice books as was given to each learner in Basic 8 . (a) Write a simplified expression for the total number of books given to the learners in Basic 8 and 9 .

Ask by Hampton Bates. in Ghana
Feb 14,2025

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The total number of books given to learners in Basic 8 and Basic 9 is \( 8y(x + 4) \).

Solución

Let the number of girls in Basic 8 be x. Then: • In Basic 8:  – Girls = x  – Boys = x + 8 • In Basic 9:  – Girls = x – 4  – Boys = twice the number of Basic 8 boys = 2(x + 8) = 2x + 16 Also, each learner in Basic 8 gets y books, while each learner in Basic 9 gets 2y books. Step 1. Find the total number of learners in each level. Basic 8 total:  Girls + Boys = x + (x + 8) = 2x + 8 Basic 9 total:  Girls + Boys = (x – 4) + (2x + 16) = 3x + 12 Step 2. Find the total number of books distributed. For Basic 8:  Total books = y (books per learner) × (2x + 8) = 2xy + 8y For Basic 9:  Total books = 2y (books per learner) × (3x + 12) = 6xy + 24y Step 3. Combine totals from both levels: Total books = (2xy + 8y) + (6xy + 24y) = (2xy + 6xy) + (8y + 24y)         = 8xy + 32y You can factor out 8y from this sum: Total books = 8y(x + 4) Thus, the simplified expression for the total number of books given to the learners in Basic 8 and Basic 9 is 8y(x + 4).

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The Deep Dive

Let’s break down the classroom dynamics! For Basic 8, the number of girls is \( x \), so the boys would be \( x + 8 \). The total number of learners in Basic 8 is \( x + (x + 8) = 2x + 8 \). In Basic 9, since there are 4 fewer girls than in Basic 8, the number of girls is \( x - 4 \) and the number of boys is \( 2(x + 8) = 2x + 16 \). Thus, the total number of learners in Basic 9 is \( (x - 4) + (2x + 16) = 3x + 12 \). Now, for the book distribution: each learner in Basic 8 receives \( y \) books and in Basic 9, each receives \( 2y \) books. So, the total number of books given away is: \[ \text{Total books for Basic 8} = (2x + 8) \cdot y \] \[ \text{Total books for Basic 9} = (3x + 12) \cdot 2y \] Combining these gives: \[ \text{Total books} = (2x + 8)y + (3x + 12)(2y) \] This simplifies to: \[ \text{Total books} = (2x + 8)y + (6xy + 24y) = 8y + 6xy + 2xy + 8y = 8y + 8xy = 8y(1 + x) \] Therefore, a simplified expression for the total number of books given to learners in Basic 8 and Basic 9 is \( 8y(1 + x) \) books.

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