Answer:135.2
Step-by-step explanation:
Let

be the identity matrix. Then pick whatever matrix you like for

.
Answer:
8
Step-by-step explanation:
Total length of the fabric is 
We need to find the number of scarves can she make if she needs 5/6 of a yard for each scarf.
Let she needs x scarves. So, ATQ

Hence, she can make 8 scarves.
Answer:42
Step-by-step explanation:
2(3+6)+(8)(3)
=(2)(9)+(8)(3)
=18+(8)(3)
=18+24
=42
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-84 is a real number, a rational number, and an integer