3 years ago

How do I solve 3x-y=15

1 answer:

4 0

Okay, 3x just means 3•x. so 3•x-y=15. you would have to have what x and y both mean to get the correct answer. but if they just need it simplified than your answer would be 3•x-y=15

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A square matrix A is said to be idempotent iff A2 = A. (i) Show that if A is idempotent, then so is I − A. (ii) Show that if A i

muminat

Answer:

Step-by-step explanation:

Given that A is a square matrix and A is idempotent

$A^2 = A$

Consider I-A

i) $(I-A)^2 = (I-A).(I-A)\\= I^2 -2A.I+A^2\\= I-2A+A\\=I-A$

It follows that I-A is also idempotent

ii) Consider the matrix 2A-I

$(2A-I).(2A-I)=\\4A^2-4AI+I^2\\= 4A-4A+I\\=I$

So it follows that 2A-I matrix is its own inverse.

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4 years ago

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3 years ago

Tim is clearing brush from a large piece of land. Tim clears 1/4 of an acre in 2 days. How

kodGreya [7K]

Answer:

8 days

Step-by-step explanation:

$\frac{1}{4} \times 4 =1$

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3 years ago

Read 2 more answers

How to solve? I prob know it I'm just stressing and panicking from all other stuff I gotta do

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Left one i think thats the one

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80

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3 years ago