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Luba_88 [7]
3 years ago
5

Solve for f. –7f − 9 = 9 − 4f f =

Mathematics
1 answer:
mixas84 [53]3 years ago
6 0

Answer:

\boxed{f = -6}

Step-by-step explanation:

=  >  - 7f - 9 = 9 - 4f \\  \\  =  >  - 7f + 4f - 9 = 9 \\  \\  =  >  - 3f = 9 + 9 \\  \\  =  >  - 3f = 18 \\  \\  =  > 3f =  - 18 \\  \\  =  > f =  -  \frac{18}{3}  \\  \\  =  > f =  - 6

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The Empirical Rule(68-95-99.7 Rule) states that, for a normally distributed random variable:

68% of the measures are within 1 standard deviation of the mean.

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(b) What percent of women over 20 have upper arm lengths less than 33.3 cm?

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