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Zinaida [17]
3 years ago
5

Pagina 32 de libri de tercero de secundaria

Mathematics
1 answer:
irga5000 [103]3 years ago
4 0

Answer:

Assignment: 06.05 Data Observation Assignment: 06.05 Data Observation

Step-by-step explanation:

Assignment: 06.05 Data Observation Assignment: 06.05 Data Observation Assignment: 06.05 Data Observation Assignment: 06.05 Data Observation Assignment: 06.05 Data Observation Assignment: 06.05 Data Observation Assignment: 06.05 Data Observation hi

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Jules has 1200 and is spending 40 per week. kelsey has 400 and is saving 50 a week. in how many weeks, will jules and kelsey hav
expeople1 [14]
After x weeks:
Jules will have: 1,200 + 40 x.
Kelsey will have: 400 + 50 x.
If we want to know in how many weeks will they have the same amount of money, we will make an equation:
400 + 50 x = 1,200 + 40 x
50 x - 40 x = 1,200 - 400
10 x = 800
x = 800 : 10
x = 80
Answer: In 80 weeks they will have the same amount of money.
4 0
3 years ago
2. A statistics student plans to use a TI-84 Plus calculator on her final exam. From past experience, she estimates that there i
Anarel [89]

Answer:

  1. P(≥1 working) = 0.9936
  2. She raises her odds of completing the exam without failure by a factor of 13.5, from 11.5 : 1 to 155.25 : 1.

Step-by-step explanation:

1. Assuming the failure is in the calculator, not the operator, and the failures are independent, the probability of finishing with at least one working calculator is the complement of the probability that both will fail. That is ...

... P(≥1 working) = 1 - P(both fail) = 1 - P(fail)² = 1 - (1 - 0.92)² = 0.9936

2. The odds in favor of finishing an exam starting with only one calculator are 0.92 : 0.08 = 11.5 : 1.

If two calculators are brought to the exam, the odds in favor of at least one working calculator are 0.9936 : 0.0064 = 155.25 : 1.

This odds ratio is 155.25/11.5 = 13.5 times as good as the odds with only one calculator.

_____

My assessment is that there is significant gain from bringing a backup. (Personally, I might investigate why the probability of failure is so high. I have not had such bad luck with calculators, which makes me wonder if operator error is involved.)

7 0
3 years ago
Six friends want to play enough games of chess to be sure every one plays everyone else. How many games will they have to play
antiseptic1488 [7]

Answer: 15 games

Step-by-step explanation:

4 0
3 years ago
Need help fast! Thanks
DENIUS [597]

Answer:

A,= 5 radical 29 /2

B, -1 - radical 2

3 0
2 years ago
Use the distributivity of multiplication of rational numbers over addition to simplify:
kipiarov [429]

9514 1404 393

Answer:

  3/8

Step-by-step explanation:

The distributive property tells you the outside factor multiplies each term inside parentheses.

  a(b +c) = ab +ac

  (-3/8)(4/7 +(-11/7)) = (-3/8)(4/7) + (-3/8)(-11/7)

  = -12/56 +33/56 = 21/56 = 3/8

3 0
2 years ago
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