MATHEMATICS MIDDLE SCHOOL

Selma hypothesizes that the mass of a sample of water will not change if it is frozen. She conducts an experiment to test her hypothesis. Her experimental steps are as follows:1. Fill a beaker with 500 mL of water.
2.
3. Place the beaker in the freezer.
4. After the water freezes, place the beaker on the balance and measure its mass.

Which of the following steps is missing from Selma's experiment?

Place the beaker on the balance and measure its mass.
Run the water through a filter to make sure there are no impurities in it.
Set a timer for 2 hours.
Use a thermometer to measure the water's temperature.

Answers

Answer 1
Answer: place a beaker on a balance and measure the mass
Answer 2
Answer:

Answer:

place the beaker on the balance and measure its mass.

Step-by-step explanation:

In order to see if the mass of the water changed, Selma first needs to find out what the mass of the liquid water is in order to compare it to the mass of the frozen water.

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X=7y-9
X+7y=8

Need help using substitution. ?! Please

Answers

X=7y-9
X=-7y+8
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+9= +9
7y=-7y+17
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Less than greater than or equal to10 fluid ounces __ 1 cup
5 qt __ 2 gallon
2 cups __ 46 fluid oz
64 fl oz __ 2 qt
3 gallons __ 22 pt
12 pt __ 3 gallons
160 fl oz __ 10 pt
100 fl oz __ 10 cups
100 qt __ 125 gallons

Answers

10 oz is greater than 1 cup
5 at is greater than 21 gallons
2 cups is less than 46 oz
64 oz is greater than 2 qt
3 gallons is greater than 22 pt

Answer:

don't know

Step-by-step explanation:

What the precents and decimals of these fraction 5/8. 66/200. 5 2/5. 2 7/16. has to be simplyed

Answers

to find the percent, divide the top number by the bottom. ex:
1/2 equals 1 divided by 2.
when you put this in a calculator, it will say .5 , this means it is 50% ( you move the decimal over 2 to the right)

Round to the place value of the underlined digit 552,945 *

Answers

600,000 because the number after the five is five so if the number is 5 or higher you round it up

A 1 digit number and a 3 digit number have a sum of 205.  The same two number have a difference of 195, a product of 1,000 and a quotient of 40.  What are the two numbers

Answers

It is 200 and 5.that is the answer

Answer:

156 and 4

Step-by-step explanation:

What is 3m + 4n - 6n

Answers

Simple,

3m+4n-6n

Simplify your variables....

4n-6n= -2n

Thus,

3m-2n.

That's it, it's simplified...done...out of here...

Thus, your answer is, 3m-2n.

Simplify

3m+4n-6n

= 3m+4n+-6n

Combine like terms

3m+4n+-6n

(3m)+(4n+-6n)

(3m)+(4n-6n)

= 3m -2n


I hope that's help !

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