Hey i need help with number 8 and 9 thanks!

Mathematics

1 answer:

snow_lady [41]2 years ago

5 0

Answer:

8 9.8 - 6.4n

9 15 - j/2

Step-by-step explanation:

2.8 - 4.4n - 2n +7

= 2.8+7 -4.4n -2n

= 9.8 - 6.4n

11 + (-3) - 1/8 j - 3/8 j +7

= 11 - 3 - 1/8 j - 3/8 j + 7

= 11 - 3 + 7 - 1/8 j - 3/8 j

= 15 - 4/8 j

= 15 - j/2

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