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RideAnS [48]
3 years ago
6

Explain how you know what number is missing in the equation 3,947 = 3,000 + +40+7

Mathematics
2 answers:
gavmur [86]3 years ago
7 0

Answer: 900

Step-by-step explanation:

Verdich [7]3 years ago
3 0

Answer:

900

Step-by-step explanation:

I'm gonna define the "missing number" as X, so it's easier.

3947 = 3000 + 40 + 7 + X

First, add all the numbers

3947 = 3047 + X

Now you've got that, to get the X value you've to leave X alone in a side of the equatioin, in our case we can subtract 3047 from each side. What ever you do in a side you've to do it the same at the other one.

3947 - 3047 = 3047 - 3047 + X

900 = X

Now we know the missing number is 900. Not sure about it? replace every X in the first equation with 900.

3000 + 40 + 7 + 900 = 3947, and that's correct.

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Part 1: How's the weather?
mariarad [96]

Answer:

Part 1: How's the weather? Investigate the weather forecast in your city.

Record the high and low temperatures that are forecast for the next 7 days in the table below. In the columns titled, Difference," record the change in temperature from the day before. To do this, subtract the previous temperature from the current temperature Be sure to use positive and negative numbers as needed! For example, if yesterday’s temperature was 70 and today’s temperature was 65, the difference is 65 – 70 = -5.

Date

High Temperature

Subtract previous temperature from current temperature

Difference

Low Temperature

Subtract previous temperature from current temperature

Difference

1

10-24-21

75

-N/A-

-N/A-

57

-N/A-

-N/A-

2

10-25-21

81

75

6

55

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-2

3

10-26-21

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1

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4

10-27-21

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0

5

10-28-21

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6

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2

6

10-29-21

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Note: The columns for Day One's subtraction and difference cannot be filled in. As this is the first data point, there is no previous temperature to subtract.

Write a mathematical expression using the information from your table to answer the following questions:

What is the mean change in the forecaster high temperatures? Remember, this can be found by averaging the values in the Difference column for the high temperatures. Show your work and steps. If your answer is not an integer, explain what two integers your answer is between.

What is the mean change in the forecaster low temperatures? Remember, this can be found by averaging the values in the Difference column for the low temperatures. If your answer is not an integer, explain what two integers your answer is between.

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
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aalyn [17]

<em>Answer:</em>

<em>d) 15/8</em>

<em>Step-by-step explanation:</em>

<em>tgB =  AC/AB = 15/8</em>

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4 0
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What is the answer ?
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