Question

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Answer 1

Answer:

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Answer 2

Answer:

18 . a) 7x - 11

19 . c) 1844

20. c) -50

Step-by-step explanation:

4(x-2) +3(x-1)

4x -8 + 3x - 3

7x - 11

3^7 - 7^3

2184 - 343

1844

(4^0 - 3^1) * 5^2

(1 - 3) * 25

-2 * 25

-50