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bonufazy [111]
3 years ago
14

I have no idea how to do this can someone please answer it.

Mathematics
1 answer:
harkovskaia [24]3 years ago
3 0

Answer:

a_{10} = 2.5(10 - 1) + 3

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For the 1,000-meter running event, Abby's mean time is 4.5 minutes with a standard deviation of 0.75 minutes. For the 800-meter
Lilit [14]

Answer:

He performed better in the 800 m race

Step-by-step explanation:

Obtain the standardized score for each event :

Zscore = (score - mean) / standard deviation

1000 meter :

Mean = 4.5 ; Standard deviation = 0.75 ; x = 4.1

Zscore = (4.1 - 4.5) / 0.75

Zscore = - 0.4 / 0.75 = - 0.5333

800 meter :

Mean = 3.2 ; Standard deviation = 0.4 ; x = 3

Zscore = (3 - 3.2) / 0.4

Zscore = - 0.2 / 0.4 = - 0.5

-0.5 > - 0.533

Hence, he performed better in the 800 m race

3 0
3 years ago
Read 2 more answers
The first four terms of an arithmetic sequence are -11,-5,1,7. what is the equation for an
mr_godi [17]

Answer:

y = 6x - 11

Step-by-step explanation:

An arithmetic sequence is a linear function. This means it steadily increases or decreases through addition/subtraction by a constant amount. Here the sequence grows by adding 6 each time.

-11 + 6 = -5

-5 + 6 = 1

1 + 6 = 7

etc....

Since this is linear, its equation has the form y = mx + b where m is the slope and b is the y-intercept. The slope is m = 6 and b = -11.

y = 6x - 11

7 0
3 years ago
Nora bought a cartoon character lunchbox for $40. A price guide says it is worth $32. What's the percent decrease?
son4ous [18]

Answer:

It might be 8

Step-by-step explanation:

40-32=8

4 0
3 years ago
Jenny can type 1,200 words in just 15 minutes. How many words can she types in anhour?
seropon [69]
She can type 4,800 words in one hour.
7 0
3 years ago
Is this graph proportional or non-proportional?
grigory [225]

Answer:

Yes

Step-by-step explanation:

The slope intercept form is y=1.38x

8 0
3 years ago
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