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| 2. | a. |
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| 3. | a. | 14 = 20/(2/3
+ 10/v) 14 • (2/3 + 10/v) = 20 2/3 + 10/v = 20/14 10/v = 20/14 - 2/3 = 16/21 v = 10 • 21/16 = 13,125 km/uur |
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| b. |
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| c. | vG
• (vT + 15) = 30vT vG • vT + 15vG = 30vT 15vG = 30vT - vG • vT 15vG = vT • (30 - vG) |
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| 4. | A : (1/6)/4
= 1/24 B: 1/(8/3) = 3/8 C: (3/2)/4 = 3/8 D: 1/(2/12) = 12/2 = 6 E: (1/2)(4/3) = 2/3 Dus D is de grootste |
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© h.hofstede (h.hofstede@hogeland.nl) |
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