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3 years ago

Which is equivalent to (4xy – 3z)2, and what type of special product is it?

Mathematics

2 answers:

bazaltina [42]3 years ago

6 0

Hello,

Answer D
16x²y²-24xyz+9z² a perfect square trinomial which
le square of the difference of 3z from 4xy.

k0ka [10]3 years ago

3 0

Answer:

$16x^2y^2-24xyz +9z^2$

Step-by-step explanation:

$(4xy - 3z)^2$

Given expression has exponent 2, so we multiply it twice

$(4xy - 3z)(4xy-3z)$

Apply FOIL method to multiply the parenthesis

multiply 4xy inside the second parenthesis

and multiply -3z inside the second parenthesis

$4xy(4xy-3z)=16x^2y^2-12xyz$

$-3z(4xy-3z)=-12xyz+9z^2$

$16x^2y^2-12xyz-12xyz+9z^2$

Combine like terms

$16x^2y^2-24xyz +9z^2$

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3 years ago

According to a marketing research study, American teenagers watched 14.8 hours of social media posts per month last year, on ave

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Answer:

The value of test statistics is 1.06.

Step-by-step explanation:

We are given that according to a marketing research study, American teenagers watched 14.8 hours of social media posts per month last year, on average. A random sample of 11 American teenagers was surveyed and the mean amount of time per month each teenager watched social media posts was 15.6. This data has a sample standard deviation of 2.5.

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