3 years ago

What's the answer???

Mathematics

1 answer:

Vladimir [108]3 years ago

8 0

A was the answer I got because she checked her answer and came up with a soution.

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If y=3x+5 and z=x^2+2x-5, what is yz?

Hitman42 [59]

<h3>Answer: 3x^3 + 11x^2 - 5x - 25</h3>

Work Shown:

yz = y(x^2+2x-5)

yz = y(x^2) + y(2x) + y(-5)

yz = x^2( y ) + 2x( y ) - 5( y )

yz = x^2( 3x+5 ) + 2x( 3x+5 ) - 5( 3x+5 )

yz = x^2*3x + x^2*5 + 2x*3x + 2x*5 - 5*3x - 5*5

yz = 3x^3 + 5x^2 + 6x^2 + 10x - 15x - 25

yz = 3x^3 + 11x^2 - 5x - 25

6 0

2 years ago

In an article in Marketing Science, Silk and Berndt investigate the output of advertising agencies. They describe ad agency outp

fredd [130]

Answer: (7.27%, 7.55%)

Step-by-step explanation:

As per given , we have

Sample size : n= 392

Sample mean : $\overline{x}=7.41\%$

$\sigma=1.43\%$

Critical two-tailed z-value for 95% confidence = $z_{\alpha/2}=1.96$

Required confidence interval would be :

$7.41\%\pm (1.96)\dfrac{1.43\%}{\sqrt{392}}\\\\=7.41\%\pm 0.14\%\\\\=(7.27\%, 7.55\%)$

Hence, the required 95% confidence interval for the mean percentage share of billing volume from network television for the population of all U.S. advertising agencies : (7.27%, 7.55%)

7 0

4 years ago

Select the correct answer.

GREYUIT [131]

I don’t know
Igditditditd

4 0

3 years ago

Joyce is helping her aunt creat craft kits. Her aunt has 138 pipe cleaners, and each kit will include 6 pipe cleaners. What is t

Setler79 [48]

They put 138 into groups of 6, so divide 138 by 6.

138/6

23 craft kits.

Hope this helps! :D

8 0

4 years ago

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Helppp mee pleaseeeeeeeee

olganol [36]

Answer: It's false.

I believe you would do (5-3) first.

5 0

3 years ago

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