Pregunta
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32) Park, Jack, and Galvin distributed prize money of \( x \) dollars among themselves. Park received \( 3 / 10 \) of what Jack and Galvin together received. Jack received \( 3 / 11 \) of what Park and Galvin together received. What is the ratio of the amount received by Park to the amount received by Jack? (A) \( 7: 8 \) (B) \( 8: 7 \) (C) \( 10: 11 \) (D) \( 14: 13 \) 33) Of Ibrahim's salary, \( \frac{1}{3} \) is spent for clothing, \( \frac{2}{5} \) for food, and \( \frac{1}{10} \) for transportation. What part of Ibrahim's salary is left for other expenditures and savings? a) \( \frac{1}{6} \) b) \( \frac{5}{6} \) c) \( \frac{2}{9} \) d) \( \frac{2}{7} \)

Ask by Mccarthy Cummings. in Egypt
Jan 24,2025

Solución de tutoría real

Respuesta verificada por el tutor

Responder

**Problem 32:** The ratio of Park's amount to Jack's amount is **14:13** (Option D). **Problem 33:** The remaining part of Ibrahim's salary is **1/6** (Option a).

Solución

Let's solve both problems step by step. --- ### **Problem 32** **Given:** - Park (P), Jack (J), and Galvin (G) share a prize of \( x \) dollars. - **Park's share:** \( P = \frac{3}{10}(J + G) \) - **Jack's share:** \( J = \frac{3}{11}(P + G) \) **Objective:** Find the ratio \( P : J \). **Solution:** 1. **Express Equations:** \[ \begin{cases} P = \frac{3}{10}(J + G) \quad \text{(1)} \\ J = \frac{3}{11}(P + G) \quad \text{(2)} \end{cases} \] 2. **Solve Equation (1) for \( G \):** \[ 10P = 3(J + G) \\ 10P = 3J + 3G \\ 3G = 10P - 3J \\ G = \frac{10P - 3J}{3} \quad \text{(3)} \] 3. **Substitute \( G \) from Equation (3) into Equation (2):** \[ J = \frac{3}{11}\left(P + \frac{10P - 3J}{3}\right) \\ 11J = 3P + 10P - 3J \\ 11J + 3J = 13P \\ 14J = 13P \\ \frac{P}{J} = \frac{14}{13} \] **Answer:** The ratio of Park's amount to Jack's amount is **\( \boxed{14 : 13} \)** (Option D). --- ### **Problem 33** **Given:** - Ibrahim spends: - \( \frac{1}{3} \) on clothing, - \( \frac{2}{5} \) on food, - \( \frac{1}{10} \) on transportation. **Objective:** Determine the remaining part of the salary for other expenditures and savings. **Solution:** 1. **Calculate Total Spent:** \[ \text{Total} = \frac{1}{3} + \frac{2}{5} + \frac{1}{10} \] 2. **Find a Common Denominator (30):** \[ \frac{1}{3} = \frac{10}{30} \\ \frac{2}{5} = \frac{12}{30} \\ \frac{1}{10} = \frac{3}{30} \] \[ \text{Total} = \frac{10}{30} + \frac{12}{30} + \frac{3}{30} = \frac{25}{30} = \frac{5}{6} \] 3. **Calculate Remaining Part:** \[ 1 - \frac{5}{6} = \frac{1}{6} \] **Answer:** The remaining part of Ibrahim's salary is **\( \boxed{\frac{1}{6}} \)** (Option a). --- **Final Answers:** - **Problem 32:** Option **(D) \( 14 : 13 \)** - **Problem 33:** Option **(a) \( \frac{1}{6} \)**

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Bonus Knowledge

To solve the first problem, let P, J, and G be the amounts received by Park, Jack, and Galvin, respectively. The relationships given can be expressed as: \( P = \frac{3}{10}(J + G) \) and \( J = \frac{3}{11}(P + G) \). By substituting and rearranging these equations, you will ultimately find the ratio of Park's amount to Jack's amount, which simplifies down to the option (B) \( 8: 7 \). For the second problem, Ibrahim’s expenditures add up to: \( \frac{1}{3} + \frac{2}{5} + \frac{1}{10} \). First, find a common denominator (which is 30), and rewrite the fractions: \( \frac{10}{30} + \frac{12}{30} + \frac{3}{30} = \frac{25}{30} \). The leftover fraction from his salary is found by subtracting this from 1 (i.e., his total salary), resulting in \( \frac{5}{30} = \frac{1}{6} \). Thus, the answer is (a) \( \frac{1}{6} \).

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