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3 years ago

Pls answer this for brainly

Mathematics

2 answers:

wariber [46]3 years ago

5 0

Answer:

Step-by-step explanation:

zimovet [89]3 years ago

4 0

Answer:

Step-by-step explanation:

x-1=3

2xy=24

3+24=27

27·2=54

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A small lawnmower company produced 1,500 lawnmowers in 2008. In an effort to determine how maintenance-free these units were, th

ikadub [295]

Answer:

The 95% confidence interval for the average number of years until the first major repair is (3.1, 3.5).

Step-by-step explanation:

The (1 - α)% confidence interval for the average using the finite correction factor is:

$CI=\bar x\pm z_{\alpha/2}\cdot\frac{\sigma}{\sqrt{n}}\cdot\sqrt{\frac{N-n}{N-1}}$

The information provided is:

$N=1500\\n=183\\\sigma=1.47\\\bar x=3.3$

The critical value of z for 95% confidence level is,

z = 1.96

Compute the 95% confidence interval for the average number of years until the first major repair as follows:

$CI=\bar x\pm z_{\alpha/2}\cdot\frac{\sigma}{\sqrt{n}}\cdot\sqrt{\frac{N-n}{N-1}}$

$=3.3\pm 1.96\times\frac{1.47}{\sqrt{183}}\times\sqrt{\frac{1500-183}{1500-1}}\\\\=3.3\pm 0.19964\\\\=(3.10036, 3.49964)\\\\\approx (3.1, 3.5)$

Thus, the 95% confidence interval for the average number of years until the first major repair is (3.1, 3.5).

7 0

3 years ago

Freyda has a circular rug with a radius of 120 centimeters. The fringe on the outside edge of the rug needs to be replaced. What

Gnom [1K]

Answer:

The Fringe of the rug is 754 cm.

Step-by-step explanation:

Given:

radius = 120 cm

We need to find the fringe of the outside rug.

Solution:

Since the rug is in the circular form.

We can say that fringe of the outside edge of the rug can be equal to circumference of the circle.

Then we will find the Circumference of the circle.

Circumference of the circle is given 2 times 'π' times radius 'r'.

framing in equation form we get;

Circumference of the circle = $2\pi r$

Circumference of the circle = $2 \times \pi \times 120 = 753.98 \approx 754\ cm$

Hence the Fringe of the rug is 754 cm.

8 0

3 years ago

Can anyone tell me who danink 662 is and how do you know him

neonofarm [45]

Answer:

He is a person with a profile on brainly. And I do believe that I have him as one of my friends*

*or not :)

Step-by-step explanation:

8 0

3 years ago

Read 2 more answers

Point A(7,3) is translated to A' (16.-9). Which rule describes the translation? IO (X)(-9.7-12) O (x,y)-> (x-9.y+12) 0 (x,y)

Ray Of Light [21]

Answer:

(x+9,y-12)

Step-by-step explanation:

sorry if this didnt help

3 0

3 years ago

Seth's mother brought home 3/4 of a chocolate cake and 1/2 of a vanilla cake that was left from a party at her work. Seth ate 1/

Oduvanchick [21]

Answer:

1/4 of the cake.

Step-by-step explanation:

Since he ate 1/3 of 3/4 of the chocolate cake, we will need to multiply fractions to solve this.

$\frac{3}{4} * \frac{1}{3} = \frac{3}{12} = \frac{1}{4}$

Therefore, he ate 1/4 of the entire cake.

5 0

3 years ago