In tryouts for the olympics a speed skater had times of 44,64,43,45,42,79 and 4,228 seconds find the average time add numbers

Answers

Answer 1

Answer:

[tex]Average = 43.29[/tex]

Step-by-step explanation:

Given

Time: 44.64,43.45,42.79 and 42.28

Required

Determine the average time

Average or mean is calculated as thus;

[tex]Mean = \frac{\sum x}{n}[/tex]

Where

[tex]\sum x[/tex] = sum of observation

n = number of observation = 4

[tex]Average = \frac{44.64 + 43.45 + 42.79 + 42.28}{4}[/tex]

[tex]Average = \frac{173.16}{4}[/tex]

[tex]Average = 43.29[/tex]

Hence, the average time is 43.29


Related Questions

I need help with this one

Answers

Answer:

22%of 2346 is 516.12 which would be 516 persons

George claims that he is 3 years less than 3 times as old as his niece Pam will be one year from now. Let p= Pam’s age now. Write an expression to represent George's age. Then simplify the expression. If George is 42 years old now, how old will Pam be next year?

Answers

Answer:

G = George's age

G = 3(P+1) - 3

G = 3P + 3 - 3

G = 3P

Step-by-step explanation:

A line passes through the points (4,17) and (7,20). Write a linear function rule in terms of x and y
for this line.
The linear function rule is y=?

Answers

Answer:

The linear function rule is [tex]\mathbf{y=x+13}[/tex]

Step-by-step explanation:

A line passes through the points (4,17) and (7,20). Write a linear function rule in terms of x and y

for this line.

The function rule is of form: y=mx+b

Where m is slope and b is y-intercept

Finding slope using formula: [tex]Slope=\frac{y_2-y_1}{x_2-x_1}[/tex]

We have [tex]x_1=4, y_1=17, x_2=7, y_2=20[/tex]

Putting values and finding slope

[tex]Slope=\frac{y_2-y_1}{x_2-x_1}\\Slope=\frac{20-17}{7-4}\\Slope=\frac{3}{3}\\Slope=1[/tex]

Finding y-intercept b

Using the point (4,17) to find y-intercept b

[tex]y=mx+b\\17=1(4)+b\\17=4+b\\b=17-4\\b=13[/tex]

So, the linear function rule is:

[tex]y=mx+b\\y=1x+13\\\mathbf{y=x+13}[/tex]

The linear function rule is [tex]\mathbf{y=x+13}[/tex]

A line passes through the points (4,17) and (7,20).

The linear function rule is y= 1x+13

Given :

A line passes through the points (4,17) and (7,20).

The linear function is y=mx+b where m is the slope

lets find out slope using formula

[tex]m=\frac{y_2-y_1}{x_2-x_1} \\(4,17) and (7,20)\\m=\frac{20-17}{7-4}=1 \\[/tex]

Slope of the line using the given points is 1

Lets pick any one point (4,17) and use slope to find function rule y

y=mx+b

x is 4  and y is 17  and m=1

[tex]17=1(4)+b\\17=4+b\\17-4=b\\13=b[/tex]

Replace the value of 'b' and write the equation

[tex]y=mx+b\\y=1x+13[/tex]

The linear function rule is y= 1x+13

Learn more :  brainly.com/question/20850886

Micro Knowledge sells 5 times as many computers as Morse Electronics. The difference in sales between the two stores is 20 computers. How many computers did each store sell?

Answers

Answer:

Morse electronics sells 5 computers

Micro knowledge sells 25 computers

Step-by-step explanation:

The computation is shown below:

Let us assume the morse electronics computer be x

So the micro knowledge computers be 5x

And, the difference between them is 20

Now the equation is

5 x - x = 20

4x = 20

x = 5

Hence, the morse electronics sells 5 computers

While on the other hand the micro knowledge sells

= 5 × 5

= 25 computers

Which inequality is shown in the graph below?

Answers

Answer:

B. y<2x-2

Step-by-step explanation:

Hope that helps!

Find the value of ƒ(5) if​

Answers

Answer:

A) 19

Step-by-step explanation:

3(5) + 4 = 19

Hope this helps you

Answer:

19

         / 2(5)-7 = 10-7 = 3   .    3 <= 1                     false

F(5)

         \ 3(5)+4 = 15+4 + 19 .    19 > 0                      true

fhdryyyyyyyyyyyyetttttttttt

Answers

Answer:

fjkn QLJKFnclqnmjfn,msfjv

Step-by-step explanation:

Answer:

jsoanjcisnzocisjsncjhsjakznc aknxosjz

Step-by-step explanation:

hajxkfj snksksnc

-2/3 x 3/4
Please help!

Answers

Answer:

-1/2

Step-by-step explanation:

Answer:

-9/8.

Step-by-step explanation:

-3/2 * 3/4

= -3*3 / 2*4

= -9/8.

Which graph represents a linear function

Answers

Answer:

A

Step-by-step explanation:

Answer:

The first Picture

Step-by-step explanation:

It is the only one with a staight line.

Can i have brainliest

Combine like terms: -4x+3-7x-8

Answers

Answer:

Basicly you just combine the terms that are the same. Combine -4x and -7x. Also combine 3 with -8.

Step-by-step explanation:

A local sorority sold hot dogs and bratwursts at the spring fling picnics. The first day they sold 8 dozen hotdogs and 13 dozen bratwursts for $330.00. The second day they sold 10 dozen hot dogs and 15 dozen bratwursts for a total of $390.00 how much did each cost?

Answers

Answer:

Hotdogs are $12.00 for the dozen or $1.00 each

Bratwursts are $18.00 for the dozen or $1.50 each

Step-by-step explanation:

I need help with this!

Answers

Answer:

9/20

Step-by-step explanation:

3/8 - 4/5 - 3/8 + 5/4

-16/20 + 25/20

-16 + 25/20

9/20

Answer: The answer is 9/20.

Step-by-step explanation:

A tv is 37 inches long and the width is 12 inches how tall is the tv?

Answers

Answer:

35 inches

I hope this helps!

IS MY ANSWER CORRECT ?? ASA IS THE WRONG ANSWER BTW

Answers

Answer:

yes

Step-by-step explanation:

A rancher has 1000 feet of fencing in which to construct adjacent, equally sized rectangular pens. What dimensions should these pens have to maximize the enclosed area?

Answers

Answer:

The dimensions that will maximize the enclosed area of the pen is 250 ft by 250 ft

Step-by-step explanation:

we have the perimeter as 1000

So the sum of the lengths will be

1000/2 = 500

The dimensions that will maximize these pens will be such that they will have equal values

Mathematically, that will be 500/2 = 250 by 250

Find the length of JL
15
None of the other answers are correct
12
3

Answers

Answer:

D: 12

Step-by-step explanation:

The entire segment KI is composed of the segments KJ and JI. So:

[tex]KI=KJ+JI[/tex]

We know that KI is 15.

KJ is (2x-15) and JI is (2x-6). Substitute:

[tex]15=(2x-15)+(2x-6)[/tex]

Solve for x. Combine like terms:

[tex]15=4x-21[/tex]

Add 21 to both sides:

[tex]4x=36[/tex]

Hence, the value of x is:

[tex]x=9[/tex]

We know that JI is 2x-6.

We will substitute 9 for x to find JI. So:

[tex]JI=2(9)-6=18-6=12[/tex]

Hence, our answer is D.

Robert bought some gifts that were each worth $25.90 at a store. He also bought one treat for himself that cost $4.00.
If Robert bought three gifts, which equation shows how to calculate the total amount of money he spent at the store?
A.3 x 25.90 +4= 89.70
B. O 3 x 25.90 +4= 81.70
C.3 x (25.90 + 4) = 89. 70
D.O3 (25.90 + 4) = 81. 70

Answers

A bc he bought three of the $25.90 then he bought only one for himself (the $4)

Answer:

A

Step-by-step explanation:

Since Roberto bought 3 gifts, which are each $25.90, that would mean it would be 3×25.90. Plus, he bought himself a treat would would be a +4.

A certain lottery requires players to select 7 different numbers, in any order, from 1 to 51 inclusive. How many different sets of 7 numbers can be chosen?

Answers

Answer:

[tex]Selection = 345025251[/tex]

Step-by-step explanation:

Given

[tex]Total = 51[/tex]

[tex]Numbers = 7[/tex]

Required

Determine number of selection

It's important that

- The first number can be any of the 51 numbers

- The second number can be any of the 51 numbers

- The third number can be any of the 51 numbers

- The fourth number can be any of the 51 numbers

And so on

Hence, number of selections is:

[tex]Selection = 51 * 51 * 51 * 51 * 51[/tex]

[tex]Selection = 51^5[/tex]

[tex]Selection = 345025251[/tex] ways

Need help with homework

Answers

Answer: A is (8.5,4) B is (2.5,1.5)

Step-by-step explanation:

What is the rat pop in 1990?
What does the model predict the rat pop was in the year 2005?

Answers

Answer:

Pop in 1990 = 81 million rats

Pop in 2005 = 127 million rats

Step-by-step explanation:

Given the function, the population of rats in 1990 is when we replace t with "0" which strictly gives the coefficient 81 that represents 81 million rats.

The rat population in 2005 is given by the formula when t = 15

This is: approximately 127 million rats.

What is 0.00000387 in scientific notation? A. 0.387 × 10–7 B. 3.87 × 10–6 C. 3.87 × 106 D. 387 × 10–8]

Answers

Answer:

C

Step-by-step explanation:

ILL MARK U BRAINLEST OKAY!

Answers

Answer:

march

Step-by-step explanation:

the negatives are all lower then 0, hope this helps

Answer:

It's march.

Step-by-step explanation:

A teacher keeps track of the number of students that participate at least three times in an optional study session each year. He models the attendance over the last nine years with this function. n(t) = 3.53t^2 - 33.04t + 117.56 Which graph would most likely be associated with the given model?

Answers

Answer:

its B

Step-by-step explanation:

The graph that would most likely be associated with the given model is an option(b).

What is a graph?

A graph contains data of which input maps to which output.

Analysis of this leads to the relations which were used to make it.

The regression equation is:

n(t) = 3.53t^2 - 33.04t + 117.56

The above regression equation is a quadratic function and non-linear.

thus, the graph must represent a non-linear relationship.

From the graphs, the only graph of the option (b) represents a quadratic function.

Other given options are either linear models or exponential.

Hence, the graph that would most likely be associated with the given model is an option(b).

Read more about regression models at:

https://brainly.com/question/18469538

#SPJ2

what is 485,783 rounded to its greatest place?​

Answers

Answer:

486

Step-by-step explanation:

if you mean 485.782 with a decimal then it would be 486

Which conclusion is best supported by this graph? Most people paid about $300 for a new home in 2013. Most people can never afford to buy a home. Most people need to take out a mortgage to purchase a home. Most people pay back a loan for a home in a short period of time.

Answers

Answer:

C) Most people need to take out a mortgage to purchase a home.

Step-by-step explanation:

A waterfall has a height of 1700 feet. A pebble is thrown upward from the top of the falls with an initial velocity of  feet per second. The height of the pebble h in feet after t seconds is given by the equation h=-16t^2+24t+1700 . How long after the pebble is thrown will it hit the​ ground?


PLEASE HELPPPPP

Answers

Answer:

[tex]t = 11.085[/tex]

Step-by-step explanation:

The expression is given as:

[tex]h=-16t^2+24t+1700[/tex]

Required

Determine how long it will hit the ground

When the pebble is on the ground, this implies that h = 0

So, we have that:

[tex]h=-16t^2+24t+1700[/tex] becomes

[tex]0=-16t^2+24t+1700[/tex]

Reorder

[tex]-16t^2+24t+1700 = 0[/tex]

Multiply through by -1

[tex]16t^2-24t-1700 = 0[/tex]

Solve using quadratic formula [tex]ax^2 + bx + c = 0[/tex]:

[tex]t = \frac{-b \± \sqrt{b^2 - 4ac}}{2a}[/tex]

Where

[tex]a = 16[/tex]   [tex]b = -24[/tex]    [tex]c = -1700[/tex]

So, we have:

[tex]t = \frac{-b \± \sqrt{b^2 - 4ac}}{2a}[/tex]

[tex]t = \frac{-(-24) \± \sqrt{(-24)^2 - 4*16*(-1700)}}{2*16}[/tex]

[tex]t = \frac{24 \± \sqrt{576 + 108800}}{32}[/tex]

[tex]t = \frac{24 \± \sqrt{109376}}{32}[/tex]

[tex]t = \frac{24 \± 330.72}{32}[/tex]

[tex]t = \frac{24 + 330.72}{32}[/tex] or [tex]t = \frac{24 - 330.72}{32}[/tex]

[tex]t = \frac{354.72}{32}[/tex] or [tex]t = \frac{-306.72}{32}[/tex]

[tex]t = 11.085[/tex] or [tex]t = -9.585[/tex]

But time can't be negative.

So: [tex]t = 11.085[/tex]

Hence, it will take 11.085 seconds to hit the ground

Keith receives $25000 salary for working as a account. If keith spends 40% of his salary on expenses each year, then how much money does Keith have to spend on expenses? Round your answer to the nearest whole number if necessary.

Answers

Answer:

$25000 * 40% = 100.000

Step-by-step explanation:


10,000 on expenses. 25000X.40=10,000

A stock price is $100. Volatility is estimated to be 20% per year. What is the an estimate of the standard deviation of the change in the stock price in one week?

Answers

Answer: if I’m correct the answer is $0.38

Step-by-step explanation:

The estimate of the standard deviation of the change in the stock price in one week is $2.77.

What is the standard deviation?

It is defined as the measure of data disbursement, It gives an idea about how much is the data spread out.

We have:

Stock price = $100

Volatility = 20% ⇒ 0.20

We know the standard deviation of change in the stock price is given by:

[tex]\rm = \frac{stock \ price \times implied \ volatility \times \sqrt{days \ to \ change} }{\sqrt{365} }[/tex]

[tex]\rm = \frac{100\times 0.20\times\sqrt{7} }{\sqrt{365} }[/tex]   (1 week = 7 days)

= 5.2343×0.20×2.646

= 2.7699 ≈ $2.77

Thus, the estimate of the standard deviation of the change in the stock price in one week is $2.77.

Learn more about the standard deviation here:

brainly.com/question/12402189

Find the value of y in the given parallelogram

Answers

Answer:

Y = 5

Step-by-step explanation:

first you subtract 5y from 9y to get 4y, then you add 13 to 7 to get 20, and then you divide 4 and 20 for your answer.

Which equation represents the graph?

Answers

Answer:

The answer is A) y+4 =3(x+3)

Step-by-step explanation:

The slope is the rate of change, which you can see from the graph is m = 3/1 = 3.

Your options are given in point-slope form:

y-y1=m(x-x1)

Pick a point from the graph. I used;

(-3, -4). Now plug this into your point slope form equation.

y-(-4) = 3(x-(-3))

y+4=3(x+3)

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