2 years ago

R.a.t.e me 1 - 10 i.d.k why

Mathematics

1 answer:

ivann1987 [24]2 years ago

4 0

10/10 you look pretty! Anyone looks pretty have a wonderful day!

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Which plane figure has three sides two of which are the same length

grin007 [14]

An isosceles triangle

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2 years ago

Which is a quadratic function? A. 3x+y^2=5 B. y=3x+5 C. x=3y+5 D. 3x^2+y=5

xxMikexx [17]

I would say that all are

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2 years ago

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 = $(57.41,\ 62.19)$

6 0

2 years ago

Help please summer school sucks!!!

svetlana [45]

Answer:

X =30

Step-by-step explanation:

= 60+90

=150

angle sum property

x+150=180

x=180- 150

x= 30

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2 years ago

Read 2 more answers

-5n+8= -7 in two-step equations-integers

Paha777 [63]

Answer:

n=3

Step-by-step explanation:

So the question we are to solve is to be solved by collecting like terms and by division

So let's solve the question

-5n+8=-7

So let's solve

-5n+8=-7

Substrate 8 from both sides

-5n=-15

So let's make n the subject of formula by dividing both sides by -5

n=3

Therefore the final answer for the given question is 3

3 0

2 years ago