lemmoncare lemmoncare

28-08-2021
Mathematics

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PLEASE HELP POINTS AND BRAINLIEST WILL BE GIVEN

PLEASE HELP POINTS AND BRAINLIEST WILL BE GIVEN class=

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jimrgrant1 jimrgrant1

28-08-2021

Answer:

- 376

Step-by-step explanation:

8u = 8(- 8i + 3j ) ← multiply each element by 8

= - 64i +24j

Then

(- 64i + 24j ) • (4i - 5j )

= (- 64 × 4) + (24 × - 5)

= -256 + (- 120)

= - 256 - 120

= - 376

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