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marta [7]
3 years ago
13

(6z 2 - 4z + 1)(8 - 3z).

Mathematics
1 answer:
Yakvenalex [24]3 years ago
7 0
Distributive property
a(b+c)+ab+ac
a(b-c)=ab-ac

(6z^2-4z+1)(8-3z)
move for nicety
(8-3z)(6z^2-4z+1)
distribute
8(6z^2-4z+1)-3z(6z^2-4z+1)=
48z^2-32z+8-18z^3+12z^2-3z=
-18z^3+48z^2+12z^2-32z-3z+8=
-18z^3+60z-35z+8
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A student wants to estimate the mean score of all college students for a particular exam. First use the range rule of thumb to m
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Answer:

See explanation below

<u>Step-by-step explanation:</u>

range = 2200 - 300 = 1900

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standard deviation = range/4 = \frac{1900}{4} = 475

The range rule of thumb estimate for the standard deviation is 475

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\alpha = 1 - 0.90 = 0.10

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n ≥ [1.64 * (\frac{475}{100})]^2

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≈ 61

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A book seller gains 30% on the cost price by selling a book for $130.Calculate the cost price of the book.​
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