Given that x= 3y and y = 2z, find x : y: z. %3D

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
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Question number 4 is the one I don’t understand
1. Which of the following is an identity?
A. a=6
С. а %3D 2а -1
2. Which of the following is equivalent to 2 :
А. 3: 10
С. 15:2
3. Express the scale 3 cm to 21 km in the form of 1: n.
A. 1:7
C. 1:100 000
4. Given that x= 3y and y = 2z, find x : y: z.
A. 6:2:1
С. 1:2:3
5. (ab-4c) =
%3D
A. ab?-8abc +4c².
C. a'b? -4abc+16c².
6. Expand 4(2a – b)(2a + b).
A. 4b2-16a
C. 16a?+ 4b2
7. Jacky typed 20 Chinese words in 1.25 minutes, Man
Transcribed Image Text:1. Which of the following is an identity? A. a=6 С. а %3D 2а -1 2. Which of the following is equivalent to 2 : А. 3: 10 С. 15:2 3. Express the scale 3 cm to 21 km in the form of 1: n. A. 1:7 C. 1:100 000 4. Given that x= 3y and y = 2z, find x : y: z. A. 6:2:1 С. 1:2:3 5. (ab-4c) = %3D A. ab?-8abc +4c². C. a'b? -4abc+16c². 6. Expand 4(2a – b)(2a + b). A. 4b2-16a C. 16a?+ 4b2 7. Jacky typed 20 Chinese words in 1.25 minutes, Man
Express the scale 3 cm to 21 km in the forn
А. 1:7
C. 1:100 000
Given that x = 3y and y = 2z, find x : y : z.
%3D
A. 6:2:1
C. 1:2:3
(ab-4c) =
%3D
Transcribed Image Text:Express the scale 3 cm to 21 km in the forn А. 1:7 C. 1:100 000 Given that x = 3y and y = 2z, find x : y : z. %3D A. 6:2:1 C. 1:2:3 (ab-4c) = %3D
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