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Alex73 [517]
3 years ago
12

What is the sST for the data set (1, 5), (2, 8), (4, 14)? 14 42 25 9

Mathematics
1 answer:
ohaa [14]3 years ago
7 0

Answer:

42

Step-by-step explanation:

SST = ∑ ( y − ¯ y ) ² (¯ y = mean of y values)

¯ y = (5+8+14)/3 = 27/3 = 9

∑ ( y − ¯ y ) ² =  ( 5 − 9 ) ² +  ( 8 − 9 ) ² +  ( 14 −9 ) ²

=  (  − 4 ) ² +  (  − 1 ) ² +  ( 5 ) ²

= 16 + 1 + 25

= 42

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Is this a function?
liraira [26]

Answer:

It isn't a function.

Step-by-step explanation:

Since there are two points on the same x value, in this case x=3, this means that these points can not be a function.

8 0
3 years ago
Jeri's lawn service charges an initial fee of $4.50 plus $3 an hour. If she is asked to
STALIN [3.7K]

Answer:

5 hours 22 minutes

Step-by-step explanation:

Let us represent the number of hours that Jeri worked as: h

Jeri's lawn service charges an initial fee of $4.50 plus $3 an hour

= $4.50 + $3 × h

= $4.50 + 3h

If she is asked to start before 7 a.m. Jeri charges 1.5 times the regular amount.

= 1.5 × ($4.50 + 3h)

If she made $29.25 on a job that began at 5 am, how many hours did Jeri work?

Hence, we have the final equation;

= 1.5 × ($4.50 + 3h) = $29.25

= 6.75 + 4.5h = 29.25

Collect like terms

= 4.5h = 29.25 - 6.75

4.5h = 22.5

h = 22.5/4.5

h = 5.3571428571

Approximately= 5.36 hours

1 hour = 60 minutes

0.36 hour =

60 × 0.36

= 21.6 minutes

Approximately ≈ 22 minutes

Therefore, Jeri worked for 5 hours 22 minutes

7 0
3 years ago
Type the correct answer in each box.
Fittoniya [83]

the answer would be 2.5

8 0
3 years ago
Read 2 more answers
HELPPP ASAP PLEASE 20 POINTS
MAXImum [283]

Answer:

i would go with D.

the intercecting point is closer to D than any other but you can decide.



6 0
3 years ago
The Empire State Building is just over 1,450 feet tall. In anticipation of visiting this landmark on your vacation, you create a
oee [108]
You have two given data available here: the actual height of the Empire State Building measuring 1,450 feet, and the height of the block measuring 2 feet. To find how many blocks stacked together would make up 1,450 feet, just divide 1,450 by 2.

Number of blocks=1,450 feet * (1 block/2 feet)
Number of blocks = 725 blocks

Therefore, you would use a model  requiring 725 blocks. The scale factor for the model is 1 block per two feet. 
3 0
4 years ago
Read 2 more answers
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