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Natasha_Volkova [10]
3 years ago
10

Lindsay needs a jewelr To repair her earrings jewelry is offering her services for an initial $125 in addition to $15 per hour j

ewelry is offering a service for initial $140 in addition to $12 per hour when will the two jewelers charge
the same amount of money
Mathematics
1 answer:
FinnZ [79.3K]3 years ago
4 0
They charge the same amount in 5 hours.
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Select all the options below that correctly fill in the blank. A ____ is a subcategory of polygon.
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Answer:

triangle is a subcategory of polygon

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Plz help I will thank u and mark u as branilyest
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 number 9 =al you have to do is one and 7 eighths =9 so your sum will be 10 and 7 eighths.

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HELP HELP !!!! PLEASE I NEED HELP WITH THIS PROBLEM !!!
Vesnalui [34]
This one is best done by elimination:

We need to start 4 meters away, so B is clearly wrong. 

We first move towards Mr. Wilson (i.e. distance is decreasing) so A is wrong.

Our speed is faster on the way back, so the two sloped section must have differing slopes, so D is wrong.
(D also doesn't start at 4, it's wrong for two reasons.)

Only C is left.

We can check each part to make sure. First we start at 4m, then move away, then stay still (zero slope) for three seconds, then move back faster (higher slope). All parts check out ok. 
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3 years ago
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PtichkaEL [24]
The slope is -3 and the y-intercept is -1
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3 years ago
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The useful life of a radial tire is normally distributed with a mean of 30,000 miles and a standard deviation of 5000 miles. The
otez555 [7]

Answer:

  empirical rule: 81.5%

  table or calculator: 81.9%

Step-by-step explanation:

The lower limit of the life range of interest has a z-score of ...

  z = (x -μ)/σ = (20,000 -30,000)/5,000 = -2

The upper limit has a z-score of ...

  z = (35,000 -30,000)/5,000 = 1

<u>Empirical rule solution</u>

The empirical rule tells you that 95% of the distribution lies within 2 standard deviations of the mean, so (100% -95%)/2 = 2.5% lie below z = -2. It also tells you 68% lie within 1 standard deviation of the mean, so (100% -68%)/2 = 16% lie above z = 1.

The fraction that lies within -2 to 1 standard deviations of the means is thus ...

  (100% -2.5% -16%) = 81.5%

The probability the tire has a life in the desired range is about 81.5%.

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<u>Calculator solution</u>

A probability calculator for the Normal distribution tells you that ...

  P(-2 < z < 1) ≈ 0.8185946

The probability the tire has a life in the desired range is about 81.9%.

6 0
3 years ago
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