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harkovskaia [24]
3 years ago
14

Molten lava 50-feet thick cools at a rate of about 20 degrees Fahrenheit per month. What is the overall change in temperature of

molten lava that is 50-feet think after four months?
Mathematics
2 answers:
aev [14]3 years ago
8 0
80 degrees over the course of four months
rjkz [21]3 years ago
4 0
80 degrees in a total of 4 months
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Type the correct answer in each box. Use numerals instead of words.
Dahasolnce [82]

Answer:

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8 0
1 year ago
The perimeter of a rectangle is 36m. If its length is increased by 1m and the width is increased by 2m, its area will increase b
maw [93]

Answer:

  80 m^2

Step-by-step explanation:

The given information lets you write two equations involving length (x) and width (y).

  • 2(x +y) = 36 . . . . the perimeter is 36 m
  • (x+1)(y+2) -xy = 30 . . . . increasing the length and width increases area

The second of these equations simplifies to another linear equation, giving a system of linear equations easily solved.

  xy +y +2x + 2 -xy = 30

  2x +y = 28 . . . . . . . subtract 2

Dividing the first equation by 2 gives

  x +y = 18

and subtracting this from the above equation gives ...

  (2x +y) -(x +y) = 28 -18

  x = 10

Then

  y = 18 -10 = 8

The area of the original rectangle is xy = 10·8 = 80 m^2.

4 0
3 years ago
What is 4-6+8 divided by 2+3-7+63times 3535
zvonat [6]

Answer:

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Step-by-step explanation:

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3 0
3 years ago
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Answers this for me plzzz really quickly????
poizon [28]

It is not A or C, and D isn't specific enough (over what amount of time? is it flying up? down? It is going forward at the same height?) The most likely thing to stay consistent is the cost of fabric and it's length.

Say 1 foot of fabric is $3 (assuming there's no discount for additional feet, but math isn't that consistent with actual store sales), then 2 is $6, and 3 is $9.  That is a constant rate of change.

4 0
3 years ago
HELP FIND PERCENT OF CHANGE AND INCREASE OR DECREASE
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3 years ago
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