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lubasha [3.4K]
4 years ago
13

Please solve. (1 1/2 x 3 3/4) - ( 2 3/5 / 1 1/2)

Mathematics
2 answers:
ale4655 [162]4 years ago
7 0
First convert the mixed numbers to improper fractions 

= (3/2 * 15/4) - (13/5 * 3/2)

=  45/8 - 39/10

=  225/40 -  156/40

=   69/40

= 1 29/40 Answer
Nostrana [21]4 years ago
5 0
For that answer i got 3 -2/120 but I'm not sure about it
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1. Choose the correct solution in roster form.
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4 years ago
An English professor assigns letter grades on a test according to the following scheme. A: Top 5% of scores B: Scores below the
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Answer:

Grade D score:

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Step-by-step explanation:

We are given the following information in the question:

Mean, μ = 78.8

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Formula:

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We have to find the value of x such that the probability is 0.77

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=P( z \leq \displaystyle\frac{x - 78.8}{7.1})=0.23  

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\displaystyle\frac{x - 78.8}{7.1} =-0.739\\\\x = 73.55  

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