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allsm [11]
3 years ago
7

Write an equation of a line containing the point (-2, 1) and is perpendicular to y= -1/4x-4

Mathematics
1 answer:
frosja888 [35]3 years ago
6 0

the answer should be -4

hope this is correct for you and this helped

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Two points on a line are (4,-1) and (1,5) what is the slope of the line
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2 tenths= ? Hundredths
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Find the missing term of the arithmetic sequence<br> 17,____,23
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8 0
3 years ago
A company manufactures 2,000 units of its flagship product in a day. The quality control department takes a random sample of 40
shepuryov [24]

Answer:

B

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n = NX / (N + X - 1)

where N is the population size, and X is defined as:

X = Z² p (1 - p) / E²

where Z is the critical value, p is the sample proportion, and E is the margin of error.

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α = 0.05, Z(α/2) = 1.96

E = 0.05

Of the 40 units tested, 2 had lifespans less than 26 days.  So the proportion is:

p = 2/40 = 0.05

Therefore:

X = (1.96)² (0.05) (1 - 0.05) / (0.05)²

X = 73

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n = 70.45

Rounding, the recommended sample size is 70.

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