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2 years ago

Will mark brainliest!! pls help

Mathematics

2 answers:

dimaraw [331]2 years ago

7 0

At a package weight of 8 they both cost $37

Reika [66]2 years ago

4 0

Answer:

weight 8 and cost 37

Step-by-step explanation:

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There are 8 tennis balls in a bag. Five of

MrRa [10]

Answer:

3/8 or a a decimal 0.375

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2 years ago

Given the functions below, find f(x)+g(x) CHECK MY ANSWERS PLEASE

Tju [1.3M]

The answer is (a)..........

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2 years ago

What does this mean ? cos θ > 0

larisa86 [58]

It means θ is in fourth quardant.

3 0

3 years ago

Need help please!! Will give points

Nataly [62]

Answer:

1. $\bar X=5.10$

2. $\sigma=0.47$

3. $\sigma^2=0.22$

Step-by-step explanation:

QUESTION 1

The given data set for the expenditure is

$4.85,5.10,5.50,4.75,4.50,5.00,6.00$

The formula for calculating the mean is given by,

$\bar X=\frac{\sum x}{n}$

We need to add all the expenditure and divide by the total number of days.

$\bar X=\frac{4.85+5.10+5.50+4.75+4.50+5.00+6.00}{7}$

This gives us,

$\bar X=\frac{35.7}{7}$

$\Rightarrow \bar X=5.10$ to the nearest hundredth.

QUESTION 2

The standard deviation of the data set is given by the formula;

$\sigma =\sqrt{\frac{\sum(x-\bar X)^2}{n} }$

This implies that,

$\sigma =\sqrt{\frac{(4.85-5.10)^2+(5.10-5.10)^2+(5.50-5.10)^2+(4.75-5.10)^2+(4.50-5.10)^2+(5.00-5.10)^2+(6.00-5.10)^2}{7} }$

This will give us,

$\sigma =\sqrt{\frac{(-0.25)^2+(0.00)^2+(0.40)^2+(-0.35)^2+(-0.60)^2+(-0.10)^2+(0.90)^2}{7} }$

$\sigma =\sqrt{\frac{0.0625+0+0.16+0.1225+0.36+0.01+0.81}{7} }$

$\sigma =\sqrt{\frac{61}{280} }$

$\sigma =0.466775$

to the nearest hundredth,

$\sigma =0.47$ .

QUESTION 3

The variance is the square of the standard deviation.

$\sigma^2 =(0.46675)^2$

$\sigma^2 =0.217857$

To the nearest hundred gives,

$\sigma^2 =0.22$

3 0

3 years ago

Which are NOT POLYNOMIALS ??

Oliga [24]

A. Simplifies into x - 4. Yes

B. Yes.

C. No, because the exponent is a fraction.

D. No, because √x has an exponent of 1/2.

E. Yes

F. Yes.

So C. and D are not polynomials :)))

5 0

3 years ago