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vitfil [10]
2 years ago
9

Please answer this!!!!!!!!!!

Mathematics
1 answer:
Marrrta [24]2 years ago
6 0

Answer:

roberto

Step-by-step explanation:

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Answer:

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Step-by-step explanation:

100 is the correct answer

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Find a ⋅ b. a = 4i - 4j, b = 4i + 5j
svetoff [14.1K]

Answer:

value of a.b = -4

Step-by-step explanation:

We need to find a.b

a= 4i-4j

b = 4i+5j

We know that i.i =1, j.j=1, i.j =0 and j.i=0

a.b = (4i-4j).(4i+5j)

a.b = 4i(4i+5j)-4j(4i+5j)

a.b = 16i.i +20i.j-16j.i-20j.j

a.b = 16(1) +20(0)-16(0)-20(1)

a.b = 16 +0-0-20

a.b = 16-20

a.b =-4

So, value of a.b = -4

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3 years ago
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Brrunno [24]

If I understand what you're saying. It would be the absolute value of -37, which is 37. Also, the absolute value of 37 is 37.

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He will have 250 dollars
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