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September 1, 2015

Homework Help: Maths! Check Answers

Posted by Jman on Wednesday, May 15, 2013 at 3:30pm.

For questions 1721, simplify the expression.
17. 7t4 7t4

49t8
14t4
49t16
14t8

18. 3(4x + 5)

7x + 15
7x 15
12x 15
12x + 15

19. 5k2(6k2 2k + 6)

30k3 + 3k2 + 30k
30k4 10k3 + 11k2
k4 + 3k3 + 11k2
30k4 10k3 + 30k2

20. (8x) 3x2

5x3
24x2
24x3
5x2
21. (7y2 3y) + (8y2 8y)

56y2 24y
15y2 11y
y2 + 5y
y2 5y

MY ANSWERS
17. A
18. C
19. D
20. ?
21. B

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