Andrew is trying to create a number puzzle for his younger sister to solve. He challenges his sister to find the mustery number. when 4 is subtracted from half a number the result is 5. The equation to represent the mystery number is 1/2m -4 =. Andrews sister tries to guess the mustery number. Her first gues is 30. Is she correct? why or why not? What is the correct answer?

Answers

Answer 1

Answer: She is not correct b/c if you solve the problem the mystery number is 18.

1/2m-4=5
+4 +4
1/2m=9 divide 9 by 1/3

m=18

You can check by replacing the m with 18 in the original equation and it will equal to 5.

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PLEASE HELP
Applications of Spheres

Answers

1.) B and C
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Write an equation to solve this problem: Twenty-four is 25 percent of what number? Find the answer .

Answers

24 times 100 then divide that by 25

Please solve this word problem fast!!

Answers

The answer would be around 168. Because 21 cars pass in 15 minutes, there are 4 15 minutes in an hour. 21x4 is 84. So 84 cars pass in an hour. But since its 2 hours you need to multiply 84 by 2. Which gets you the final answer of 168

Is 14/25 greater than 0.75

Answers

No, it is Not, because 14/25 is equavalent to .56 something, and that is less than .75.

What is 245.3 divided by 5=?

Answers

To do this without a calculator:

5 goes into 2 0 times.
5 goes into 24 4 times with a remainder of 4.
5 goes into 45 9 times
5 goes into 3 0 times
5 goes into 30 6 times

the answer is 49.06

look up long division for more info
049.06
5 ) 245.3
20
45
45
030
30

49.06
5 ) 245.30
-20
45
-45
03
30
-30
0

When you divide into a decimal, just ignore the decimal point doing your work at the bottom. If you run out of decimal places, just add a 0 to the end.

5 doesn't go into 2, so skip to the next part.
5 goes into 24 a total of 4 times.
4 times 5 is 20. 24 minus 20 is 4. Bring down the 5.
5 goes into 45 a total of 9 times.
9 times 5 is 45. 45 minus 45 is 0. Bring down the 3.
Bring up the decimal point.
5 doesn't go into 3, so put up a 0.
0 times 5 is 0. 3 minus 0 is 3. Add a zero to the end and bring it down.
5 goes into 30 a total of 6 times.
6 times 5 is 30. 30 minus 30 is 0. We're done!

Your answer is 49.06.

How can you use models to explain why 3.1=3.10?

Answers

Answer:

3.1 = 3.10 because adding zero (0) in decimal number at the right most side doesn't affect the number as the same way adding zero at the left most side of a number doesn't affect the number.

Also, 3 and 1 ones are the same as 3 and 10 tenths.

Adding a zero would not do anything after a decimal because 1 is the tenth, and adding a zero will still make it 3 wholes and 1 tenth....0 hundredths.

That is why 3.1 = 3.10

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