All categories

3 years ago

Can I get help with this -5-(3^2+2)

Mathematics

2 answers:

True [87]3 years ago

4 0

The answer I got is negative 16

guapka [62]3 years ago

3 0

Answer:

-16

Step-by-step explanation:

-5-(3^2+2)

Parentheses first

-5-(9+2)

-5-(11)

Subtract

-16

You might be interested in

Three quarters of the boats in the marina are white, 4/7 of the remaining boats are blue, adn the rest are red. If there are 9 r

Sveta_85 [38]

Ask a parent because I have no clue.

4 0

4 years ago

Just looking for a boy bsf (less than 14) also im friking bored :|

Anettt [7]

Answer:

I am bored too

Step-by-step explanation:

Go to school, sit down, and you will come to find the answer

7 0

3 years ago

A quality analyst of a tennis racquet manufacturing plant investigates if the length of a junior's tennis racquet conforms to th

Burka [1]

Answer:

Confidence interval : $21.506$ to $24.493$

Step-by-step explanation:

A quality analyst selects twenty racquets and obtains the following lengths:

21, 25, 23, 22, 24, 21, 25, 21, 23, 26, 21, 24, 22, 24, 23, 21, 21, 26, 23, 24

So, sample size = n =20

Now we are supposed to find Construct a 99.9% confidence interval for the mean length of all the junior's tennis racquets manufactured at this plant.

Since n < 30

So we will use t-distribution

Confidence level = 99.9%

Significance level = α = 0.001

Now calculate the sample mean

X=21, 25, 23, 22, 24, 21, 25, 21, 23, 26, 21, 24, 22, 24, 23, 21, 21, 26, 23, 24

Sample mean = $\bar{x}=\frac{\sum x}{n}$

Sample mean = $\bar{x}=\frac{21+25+23+22+24+21+25+21+23+ 26+ 21+24+22+ 24+23+21+ 21+ 26+23+ 24}{20}$

Sample mean = $\bar{x}=23$

Sample standard deviation = $\sqrt{\frac{\sum(x-\bar{x})^2}{n-1}}$

Sample standard deviation = $\sqrt{\frac{(21-23)^2+(25-23)^2+(23-23)^2+(22-23)^2+(24-23)^2+(21-23)^2+(25-23)^2+(21-23)^2+(23-23)^2+(26-23)^2+(21-23)^2+(24-23)^2+(22-23)^2+(24-23)^2+(23-23)^2+(21-23)^2+(21-23)^2+(26-23)^2+(23-23)^2+(24-23)^2}{20-1}}$

Sample standard deviation= s = $1.72$

Degree of freedom = n-1 = 20-1 -19

Critical value of t using the t-distribution table $t_{\frac{\alpha}{2}$ = 3.883

Formula of confidence interval : $\bar{x} \pm t_{\frac{\alpha}{2}} \times \frac{s}{\sqrt{n}}$

Substitute the values in the formula

Confidence interval : $23 \pm 1.73 \times \frac{1.72}{\sqrt{20}}$

Confidence interval : $23 -3.883 \times \frac{1.72}{\sqrt{20}}$ to $23 + 3.883 \times \frac{1.72}{\sqrt{20}}$

Confidence interval : $21.506$ to $24.493$

Hence Confidence interval : $21.506$ to $24.493$

3 0

4 years ago

Read 2 more answers

4 + 8x = -12 <br> what is X?

Elena L [17]

Answer:

x=-2

Step-by-step explanation:

4+8x=-12

-4 -4

8x = -16

/8 /8

x = -2

5 0

3 years ago

Read 2 more answers

The radius of a circle is equal to 8 units. Find the central angle that intercepts an arc length of

lana66690 [7]

Answer:

ewwwwww

I can't believe how much I love the opportunity and I have a strong doubt that she is it possible for you to know if you get the chance to read it and it is

let your keyboard type for you

3 0

3 years ago