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Reika [66]
3 years ago
8

PLEASE HELP ASAP THANK YOU

Mathematics
1 answer:
masha68 [24]3 years ago
6 0
1-85.71% of the team attendance
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Kristin bought a pack of 12<br> pencils for $1.25. How<br> much was each pencil?????????????
gregori [183]

Answer:

$0.10/pencil

Step-by-step explanation:

Find the unit cost.  To do this, divide $1.25 by 12 pencils, obtaining:

 $1.25

---------------- = $0.1042/pencil, or (more logically) $0.10/pencil

12 pencils

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4 years ago
Matrix A is said to be involutory if A2 = I. Prove that a square matrix A is both orthogonal and involutory if and only if A is
goblinko [34]

Answer:

4 · 1/4 (I-0) = (A-0)∧2

see details in the graph

Step-by-step explanation:

Matrix A is expressed in the form A∧2=I

To proof that Matrix A is both orthogonal and involutory, if and only if A is symmetric is shown by re-expressing that

A∧2=I in the standard form

4 · 1/4 (I-0) = (A-0)∧2

Re-expressing

A∧2 = I as a graphical element plotted on the graph

X∧2=I

The orthogonality is shown in the graphical plot displayed in the picture. Orthogonality expresses the mutually independent form of two vectors expressed in their perpendicularity.

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