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3 years ago

Evaluate −12÷18−6 how do I solve this

1 answer:

7 0

Step #1:
Remind yourself of PEMDAS.

The 'MD' part reminds you that you're supposed to
take care of any multiplication or division before you
worry about the 'AS' ... the addition and subtraction.

Step #2:
Look for multiplication or division.

Do you see any ?
I see -12 ÷ 18 and that's - 2/3 .

Step #3:
NOW do the subtraction.

- 2/3 - 6 = - (6 and 2/3) .

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3 years ago

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Bess [88]

Answer:

Results are (1) True. (2) False. (3) False. (4) True. (5) True. (6) True.

Step-by-step explanation:

Given A is an $m\times n$ matrix. Let $T :U\to V$ be the corresponding linear transformationover the field F and $\theta$ be identity vector in V. Now if $x\in Ker( T)\implies T(x)=\theta$ .

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Let $x,y\in Ker( T)$ , then,

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Finally, fore all vectors $u\in U$ ,

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$\implies \theta\in Ker(T)$

Thus Ker(T) is a subspace.

(2) If the equation Ax=b is consistent, then Col(A) is $\mathbb R^m$ : False

if the equation Ax=b is consistent, then Col(A) must be consistent for all b.

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: True.

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(

−

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