Plz Hurry This Is Timed

Mathematics

2 answers:

makkiz [27]2 years ago

6 0

Answer:

2nd answer. it is because it is

Studentka2010 [4]2 years ago

5 0

Answer:

I believe the correct answer is the first one

Step-by-step explanation:

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The width of a poster is 8cm less than the length. The perimeter is more than 184

mart [117]

Let the length be x
width = x - 8
Perimeter = Length + Length + Width + Width

x + x + x - 8 + x - 8 > 184
4x - 16 > 184
4x > 184 + 16
4x > 200
x > 50

Therefore:
Length > 50
Width > 50 - 8
Width > 42

Ans: Length > 50, Width > 42

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2 years ago

Evaluate 10x2y-2 for x = -1 and y = -2.

Rzqust [24]

Answer:

Step-by-step explanation:

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2 years ago

Read 2 more answers

Let x denote the courtship time for a randomly selected female–male pair of mating scorpion flies (time from the beginning of in

gavmur [86]

Complete Question:

a) Is it plausible that X is normally distributed?

b) For a random sample of 50 such pairs, what is the (approximate) probability that the sample mean courtship time is between 100 min and 125 min?

Answer:

a) It is plausible that X is normally distributed

b) probability that the sample mean courtship time is between 100 min and 125 min is 0.5269

Step-by-step explanation:

a)X denotes the courtship time for the scorpion flies which indicates that is a real - valued random variable, and since normal distribution is a continuous probability distribution for a real valued random variable, it is plausible that X is normally distributed.

b) Probability that the sample mean courtship time is between 100 min and 125 min

$\mu = 120\\n = 50$