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3 years ago

How to solve this and find x and y variables.

Mathematics

1 answer:

Lelechka [254]3 years ago

6 0

Y equals 64 and x equals 30

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Milk is a good source of many vitamins that can help us stay healthy. FDA recommends that the average vitamin A concentration fo

Lelechka [254]

Answer:

The degrees of freedom for this sample are 27.

The sample size to get a margin of error equal or less than 0.3656 is n=4450.

Step-by-step explanation:

The degrees of freedom for calculating the value of t are:

$df=n-1=28-1=27$

With 27 degrees of freedom and 95% confidence level, from a table we can get that the t-value is t=2.052.

The sample size to get a margin of error equal or less than 0.3656 can be calculated as:

$MOE=t\cdot s/\sqrt{n}\\\\n=\left(\dfrac{t\cdot s}{MOE}\right)^2=\left(\dfrac{2.052\cdot 11.8841}{0.3656}\right)^2=66.7^2\\\\\\n=4449.13\approx4450$

6 0

3 years ago

Find the first, fourth, and tenth terms of the arithmetic sequence described by the given rule.

lubasha [3.4K]

Answer:

The answer is option C.

Step-by-step explanation:

The arithmetic sequence is given by

$A(n) = - 6 + (n - 1)( \frac{1}{5} )$

where n is the number of terms

For the first term

n = 1

So we have

$A(1) = - 6 + (1 - 1)( \frac{1}{5} )$

$= - 6 + (0)( \frac{1}{5} )$

$= - 6$

For the fourth term

n = 4

$A(4) = - 6 + (4 - 1)( \frac{1}{5} )$

$= - 6 + (3)( \frac{1}{5} )$

$= - 5 \frac{2}{5}$

For the tenth term

n = 10

$A(10) = - 6 + (10 - 1)( \frac{1}{5} )$

$= - 6 + (9)( \frac{1}{5} )$

$= - 4 \frac{1}{5}$

Hope this helps you

4 0

2 years ago

You have 26 cards, each labeled with a letter of the alphabet. What is the probability of drawing a card that contains one of th

UNO [17]

4/26 which simplified to 2/13

so 2/13 is the answer

6 0

2 years ago

Read 2 more answers

What is the distributive property of -4 (10-b)

brilliants [131]

Answer:

-40+4b

Step-by-step explanation:

You multiply the outside (-4) by the things within the parentheses

6 0

2 years ago

Read 2 more answers

Can someone help me with 2) and 3)

zzz [600]

2) 15+12=27
3) 66/6=11

8 0

2 years ago

Read 2 more answers