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dusya [7]
2 years ago
12

Please answer this correctly

Mathematics
1 answer:
ehidna [41]2 years ago
7 0
It should be 105 because it’s equal
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A random sample of 169 observations is to be drawn from a population with a mean of 80 and a standard deviation of 39. find the
Drupady [299]
Mu=80, sigma=39, X=85
Z=(X-mu)/sigma = 5/39=0.128=0.13
P(X<=85)= 0.5517 (from Z-table)
so, P(X>85)=1-0.5517=0.4483 approx. thats 44.8% probability.

8 0
2 years ago
Describe and correct the error in finding DC
sleet_krkn [62]

Answer:

DC = 2

Step-by-step explanation:

The wrong equation was used.

The right equation to use based on the midsegment theorem of a trapezoid is:

MN = ½(AB + DC)

MN = 8

AB = 14

Substitute

8 = ½(14 + DC)

Multiply both sides by 2

8*2 = ½(14 + DC)*2

2*8 = 14 + DC

16 = 14 + DC

16 - 14 = 14 + DC - 14

2 = DC

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3 years ago
Solve: 2x+6-10x=30
LiRa [457]
The answer will be -3
3 0
3 years ago
Help please Please I need help
Ipatiy [6.2K]

Answer:

D. -2 and 6

Step-by-step explanation:

Use the quadratic formula to put either -2 or 6 in and get it to equal 0.

6 0
3 years ago
Determine whether each pair of figures is similar. (pic included)
ivann1987 [24]

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it ether b or c

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