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ehidna [41]
3 years ago
13

Evaluate the algebraic expression 1.5t-7.2 for each given value.

Mathematics
2 answers:
svet-max [94.6K]3 years ago
8 0

Answer:

1.8 and -14.7

Step-by-step explanation:

Given the algebraic expression 1.5t-7.2, to get the value of the expression when t = 6, we will substitute the value of t in the given equation to have;

1.5(6)-7

= 9.0-7.2

= 1.8

Similarly when t = -5, the expression 1.5t-7.2 gives;

1.5(-5)-7.2

= -7.5-7.2

= -14.7

Therefore the expression of the equation at x = 6 is 1.5(6)-7.2 gives 1.8 will at x=-5 gives 1.5(-5)-7.2 which gives -14.7

erastovalidia [21]3 years ago
6 0

Answer:

1.8 and -14.7

Step-by-step explanation:

its just to substitute it as t and simplify

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Step-by-step explanation:

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Accrotime is a manufacturer of quartz crystal watches. Accrotime researchers have shown that the watches have an average life of
kirza4 [7]

Answer:

a

   P(X <  24 )=  21.186\%  

b

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Step-by-step explanation:

From the question we are told that

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 The standard deviation is  \sigma  =  4 \  months

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      P(X <  24 )=  P(\frac{X - \mu }{ \sigma} <  \frac{24 - 26}{4}  )

Generally  \frac{X - \mu}{\sigma } =Z (The  \ standardized \  value  \  of  \  X )

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Generally from the z-table  

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So

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Converting to percentage

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Generally the duration that should be the guarantee period if  Accrotime does not want to make refunds on more than 6% is mathematically evaluated as

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=> P(X <  x) =  P(Z < \frac{x - 26}{4} )= 0.06

From the normal distribution table the z-score for  0.06 at the lower tail  is

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So

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