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3 years ago

Find the area of the shape. 19 yd 5 yd 6 yd 9 yd The area is

Mathematics

1 answer:

finlep [7]3 years ago

6 0

Answer:

Step-by-step explanation:

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Why is 2 + (−3) equal to −1? (1 point)

KiRa [710]

A) Because it is 3 units to the left of 2 on a horizontal number line<span />

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3 years ago

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Randomly selected students participated in an experiment to test their ability to determine when one minute (or sixty seconds)

zalisa [80]

Answer: $(57.41,\ 62.19)$

Step-by-step explanation:

Given : Sample size : $n=40$

Sample mean : $\overline{x}=59.8\text{ seconds}$

Standard deviation : $\sigma =9.2\text{ seconds}$

Significance level : $\alpha=1-0.9=0.1$

Critical value : $z_{\alpha/2}=1.645$

Formula to find the confidence interval for population mean :-

$\overline{x}\pm z_{\alpha/2}\dfrac{\sigma}{\sqrt{n}}\\\\=59.8\pm(1.645)\dfrac{9.2}{\sqrt{40}}\\\\\approx59.8\pm2.39\\\\=(59.8-2.39,\ 59.8+2.39)\\\\=(57.41,\ 62.19)$

Hence, a 90% confidence interval estimate of the population mean of all students = $(57.41,\ 62.19)$

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3 years ago

2.1(2.3 + 2.1x) = 11.65 + x. Step by step equation please help

DedPeter [7]

Answer:

x=2

Step-by-step explanation:

2.1(2.3 + 2.1x) = 11.65 + x

Distribute

4.83+4.41x=11.65+x

bring 4.83 over (-)

4.41x=6.82+x

bring x over

4.41x-1(x)=6.82

4.41-1=3.41 so

3.41x=6.82

divide 3.41

x=2

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3 years ago

How do you simplify −7(2x−11)

DanielleElmas [232]

Answer:

−7(2x−11)

use distributive property

-7(2x)-7(-11)

-14x+77

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3 years ago

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The zoo is creating a new tank for some of its fish. The zoo wants the tank to be a cube and be able to hold 3,375 cubic feet of

Verizon [17]

Answer:

³√3375

Step-by-step explanation:

Hope this will help guys

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3 years ago