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Tamiku [17]
3 years ago
9

What is the exam score for an exam whose z-score is 1.25?

Mathematics
1 answer:
mojhsa [17]3 years ago
4 0

Answer:

85

Step-by-step explanation:

A z-score of 1.25 means that the actual exam score is 1.25 standard deviations above the mean, and therefore the exam score we are looking for is: mean + 1.25 * SD = 75 + 1.25 * 8 = 85

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Point p is the midpoint of DE. DP =3x + 2 and DE = 10x - 12. What is the length of DP
shepuryov [24]
If P <span>is the midpoint of DE then 
DE = 2(DP)
10x - 12 = 2(3x + 2)
10x - 12 = 6x + 4
10x - 6x = 4 + 12
4x = 16
x = 16/4
x = 4

DP = 3x + 2 = 3 * 4 + 2 = 12 + 2 = 14 units</span>
6 0
3 years ago
Read 2 more answers
Could someone pleaseeeeee help me with my math! Thank you &lt;3
Papessa [141]
1 7/9-2/9=1 5/9

Hope this helps:)
8 0
3 years ago
samuel fell asleep after they had travelled 90 miles. if the total length of the trip was 600 miles, what percentage of the tota
natali 33 [55]
<h2>Answer:</h2><h2>Samuel fell asleep after travelling 90 miles which is 15%of their total trip distance.</h2>

Step-by-step explanation:

The total length of the trip = 600 miles

Samuel fell asleep after they had travelled  = 90 miles

Percentage of the total trip travelled when samuel fell asleep = \frac{90}{600} (100)

= 15%

Samuel fell asleep after travelling 90 miles which is 15%of their total trip distance.

5 0
2 years ago
18. The sum of 'l6, /3, and 'Is is
lys-0071 [83]

Answer:

wn work

Step-by-step explanation:

3 0
3 years ago
Can someone explain this I dont understand it
IrinaVladis [17]
Y = mx + b

m is your slope AKA rate of change
b is the y intercept.

from the graph we can see that the y intercept (b) is 15. (look at the y axis and see what point the line crosses on the y, here it is 15, in-between 10 and 20)

slope is rate of change. to figure this out remember slope = rise over run:

slope = \frac{rise}{run}

so pick two points. how much does one point rise after the other point you picked? In the graph it rises 1 square so rise = 1

Now looking at the same two points, how far away from each other are they on the x axis? Looking at the graph they are 2 squares away from each other. so run = 2

Now plug these numbers into the rise over run formula:

slope \: = \frac{1}{2}

Now we have everything we need to put into our formula for a line:

y = mx + b
y = \frac{1}{2} x + 18

For number 16 you should get:

y = \frac{1}{5} x + 3

after you do the same steps again yourself
8 0
3 years ago
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