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Nadusha1986 [10]
2 years ago
13

A circular garden has a circumference of 85 yards. Lars is digging a straight line along a diameter of the garden at a rate of 9

yards per hour. How many hours will it take him to dig across the garden? Use 3.14 for π and round the diameter to the nearest whole number, if necessary.
Mathematics
1 answer:
maks197457 [2]2 years ago
5 0

Answer:

xxx

Step-by-step explanation:

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A regular heptagon has sides measuring 26 mm and is divided into 7 congruent triangles. Each triangle has a height of 27 mm. Wha
Inessa [10]
567 square mm
because 27*7 is 189 an times 3 because each side has 3 sides so it equals to 567 square mm! :)

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Solve system of equation by substitutions? y= 1<br><img src="https://tex.z-dn.net/?f=y%20%3D%20x%20-%208%20" id="TexFormula1" ti
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1=x-8
add 8 to both sides
9=x

checking that it works
1=9-8
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so 9=x
5 0
3 years ago
A student reduces the temperature of a 300 cm3 balloon from 60°C to 30°C. What will the new volume of the balloon be? (Remember
amid [387]
Assuming constant pressure, V/T = constant.

Where T is absolute temperature, and V is volume.

T1 = 60 ° + 273.15 = 333.15 K
V1 = 300 cm^3

T2 = 30°C + 273.15 = 303.15 K
V2 = ?

V1 / T1 = V2 / T2 = >  V2 = [V1/T1] * T2

V2 = [300cm^3 / 333.15K] * 303.15K = 272.9 cm^3

Answer: 272.99 cm^3
4 0
3 years ago
Write the equation of the line that passes through the points (8,-1) and (2,-5) in standard from, given that the point-slope fo
Gnesinka [82]

Answer: 2/3x-y=19/3

Step-by-step explanation:

Points are useless since we already know the point slope form and we can just simply that

y+1=2/3(x-8)

y+1=2/3x-16/3

y=2/3x-19/3

2/3x-y=19/3

4 0
2 years ago
The table shows the results of a survey at a local school. The survey asked 7th and 8th graders if they pack their lunches or if
Aneli [31]

Answer: The table is shown in the attached image

  • Row One:   19,    28,    47
  • Row Two:   19,    33,    52
  • Row Three: 38,   61,    99

The commas are not to be entered in any of the boxes. Just the numbers only.

=====================================================

Explanation:

"47 seventh graders were surveyed" means that 47 goes in the last value of the first row. This is the total of the 7th graders. Of this total, 19 pack their lunches (ie bring them from home). That indicates 47-19 = 28 seventh graders buy their lunch.

For row one, we have the values: 19, 28, 47 in that exact order when going from left to right.

------------------

We use the same idea for the 8th graders.

52 total eighth graders, 33 buy their lunch

52-33 = 19 pack their lunch

For row two, the values from left to right are: 19, 33, 52 in that exact order.

To get the values in row 3, we add up everything that's over top of it.

Meaning for column 1, we have 19+19 = 38 total students who pack their lunch. In column 2, there are 28+33 = 61 people who buy their lunch. Lastly, column 3 we have 47+52 = 99 students overall.

For row three, the values from left to right are: 38, 61, 99

Note that adding the first two items of row three gets us 38+61 = 99

It's not a coincidence that this is happening. This is just another way to get the grand total of 99. You could also add up the four values that are not in the total column or total row to get 19+28+19+33 = 99. Again, this is not a coincidence we end up with 99.

Refer to the table below to see a summary.

5 0
2 years ago
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