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Ivahew [28]
2 years ago
10

I neeeeeeddddd helppppppppppppppp

Mathematics
2 answers:
Aleks04 [339]2 years ago
8 0

Answer:

x = 4

Step-by-step explanation:

Cross multiply:

21*2 = 14(x - 1)

42 = 14x - 14

14x = 56

x = 4

PilotLPTM [1.2K]2 years ago
4 0

Answer:

42=14z-14

14z=56

z=4

Step-by-step explanation:

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A doctor at a local hospital is interested in estimating the birth weight of infants. How large a sample must she select if she
Nataly_w [17]

Answer:

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n = (\frac{1.96\sqrt{\sigma}}{4})^2

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