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3 years ago

Helppp im soo confused

Mathematics

2 answers:

garik1379 [7]3 years ago

7 0

Answer:

a AND d

Step-by-step explanation:

option - a

and

Option- d

I hope im right !

olganol [36]3 years ago

3 0

Answer:

A, D

Step-by-step explanation:ad

A. x = 3

B. x = 3/4

C. x = -9/2

D. x = 3

Sidenote: Hope this helps! :D

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A flagpole has a height of 2222 yards. It will be supported by three cables, each of which is attached to the flagpole at a poi

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3 years ago

Ardie bought 547 acres of land for development. If 29 acres of his purchase is reserved for a park, how many two-acre building l

9966 [12]

Hey there!

First, is he used 29 out of the 547 for a park, he can't use them for two acre building lots, so we must subtract:

547-29 = 518

If we want to know how many 2 acre building lots we can sell, we can divide 518 by 2, as dividing it by 2 sees how many times 2 goes into 518- essentially how many two acre lots are in 518 acres.

This gives us 259 two-acre building lots.

Hope this helps!

8 0

3 years ago

the first term of an arithmetic sequence is equal to 200 and the common differencence is equal to -10. find the value of the 20t

olga_2 [115]

Answer:

The value for 20th term is 10.

Step-by-step explanation:

First, you have to find the formula for the sequence.

$an = a + d(n - 1)$

$let \: a = 200,d = - 10$

$an = 200 - 10(n - 1)$

$an = 200 - 10n + 10$

$an = - 10n + 210$

Given that the formula of this sequence is an = -10n + 210. Next, you have to find 20th term :

$let \:n = 20$

$20th \: term = - 10(20) + 210$

$20th \: term = - 200 + 210$

$20th \: term = 10$

(Correct me if I am wrong)

7 0

4 years ago

A tobacco company claims that the amount of nicotene in its cigarettes is a random variable with mean 2.2 and standard deviation

Aleksandr-060686 [28]

Answer:

0% probability that the sample mean would have been as high or higher than 3.1 if the company’s claims were true.

Step-by-step explanation:

To solve this question, we need to understand the normal probability distribution and the central limit theorem.

Normal probability distribution

Problems of normally distributed samples are solved using the z-score formula.

In a set with mean $\mu$ and standard deviation $\sigma$ , the zscore of a measure X is given by:

$Z = \frac{X - \mu}{\sigma}$

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

Central limit theorem

The Central Limit Theorem estabilishes that, for a random variable X, with mean $\mu$ and standard deviation $\sigma$ , a large sample size can be approximated to a normal distribution with mean $\mu$ and standard deviation $s = \frac{\sigma}{\sqrt{n}}$