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____ [38]
3 years ago
7

Jonas jogged up the hill at an average rate of of a mile per minute and then walked down the hill at an average rate of of a mil

e per minute. The round trip took him 42 minutes. What is the missing value in the table that represents the distance of the trip down the hill?
Mathematics
1 answer:
jenyasd209 [6]3 years ago
4 0
The missing value depends on the speed of jonas to total miles  covered by jonas.......if we were to assume that he jogged up the hill at a distance of 15minutes  then the trip took him 42 min in total so the remaining travel time would be 27 minutes .....lets say he is walking down the hill at .5 miles per min,.. you shpuld multiply by 27 by .5 which is 13.5
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X2 +10x=39 , how do i solve or whats the answer
stealth61 [152]

Answer:

x = 3,-13 :)

Step-by-step explanation:

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3 years ago
A scientist studying water quality measures the lead level in parts per billion (ppb) at each of 49 randomly chosen locations al
NeX [460]

Complete Question

The complete qustion is shown on the first uploaded image

Answer:

The correct option is B

Step-by-step explanation:

From the question we are told that

      The sample size  is  n = 49

       The mean is  \mu  =  17ppb

       The standard deviation is \sigma =  14 ppb

Generally the standard error of this measurement is mathematically represented as

       \sigma_z  =  \frac{\sigma}{\sqrt{n} }      

substituting values

      \sigma_{\= x}  =  \frac{14}{\sqrt{49} }  

     \sigma_{\= x}  =  2ppb

Now the probability that the mean lead level from the sample of 49 measurements T is less than 15 ppb represented as P(X < 15 )

Next is to find the z value

    z =  \frac{\mu -\sigma }{\sigma_{\= x}}

     z =  \frac{15-17}{2}

      z =  -1

Now checking the z-table for the z-score of  -1 we have  

      P(X

                       

       

     

5 0
4 years ago
What ratio correctly compares the measurements 10,000 cm to 1000 m? Drag and drop the appropriate numbers into the boxes to show
Rom4ik [11]
Im sorry but what exactly are you looking for here?

6 0
3 years ago
Read 2 more answers
I don't know what this is can you pls help me??
babymother [125]

well you add the two number and you put the whole number in the first single square and the actual fraction you put in the two 2 squares



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8 0
3 years ago
Please i need help with the answers this is due later on today
Nutka1998 [239]

Answer:

384, 216, 290, 192, 384

1446, 1 roll

Step-by-step explanation:

For rectangular boxes, calculate the sum of each side, then multiply it by two.

Box 1: 2(18 x 5) + 2(18 x 4) + 2(5 x 4) = 364

Box 3: 2(11 x 8) + 2(8 x 3) + 2(3 x 11) = 290

Box 5 is a cube (all sides equal), so you can find 1 side's area and multiply it by 6.

Box 5: 6(8 x 8) = 384

For triangular boxes, calculate the edges, then find the triangular area using area = 0.5(base x height).

Box 2: (15 x 3) + (9 x 3) + (12 x 3) + 2(0.5)(9 x 12) = 216

Box 4: 2(13 x 2) + (10 x 2) + 2(0.5)(10 x 12) = 192

Total: 364 + 290 + 384 + 216 + 192 = 1446

Rolls of wrapping paper:

Area of 1 roll = 30 x 60 = 1800

Since 1446 is less than 1800, you only need 1 roll of wrapping paper.

8 0
3 years ago
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