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3 years ago

Which is an example of a chemical change

1 answer:

8 0

A chemical change results from a chemical reaction, while a physical change is when matter changes forms but not chemical identity. Examples of chemical changes are burning, cooking, rusting, and rotting. Examples of physical changes are boiling, melting, freezing, and shredding.

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The price of a stock decreased by 60 cents one week, decreased 10 cents the next week, and decreased another 20 cents the follow

mel-nik [20]

Hi there! Hopefully this helps!

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It decreased by 30 cents per week.

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The average rate of change is calculated as:

the ratio of the sum of the change in the three weeks divided by the number of weeks. (The number of weeks being 3)

Rate of change = $\frac{-60 -10 -20}{3}$ .

(-60 + -10 + -20 = -90). So, to simplify it:

$\frac{-90}{3}$ = -30

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Incase you are confused:

Since the average rate of change is negative, this means that the stock price has decreased.

3 0

3 years ago

I please solve and explain

lisov135 [29]

Answer:

Step-by-step explanation:

4 0

2 years ago

Solve 31-X + (2 x + 1)] = x - 1.

Kobotan [32]

Answer:

x = X + 33 (I am guessing "x" and "X" are not the same. "x" is a variable and "X" is a constant.)

Step-by-step explanation:

31 - X + (2x+1) = x - 1

or, 2x+1 = x - 1 - 31 + X

or, 2x - x = -1 -31 + X -1

or, x = -2 -31 + X

or, x = X - 33

6 0

2 years ago

What is the volume of this?

Oksanka [162]

Answer:

82 in^3

Step-by-step explanation:

3 x 2 x 7 + 2 x 2 x 10 = 82 in^3

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2 years ago

A survey about the student government program at a school finds the following results:

Serhud [2]

A total of 440 students took part in the survey. Each student makes up 0.8181818182% of the central angle of the circle graph. You get to this number by dividing 360 degrees by 440 students. Then you simply multiply this number by 110 students (who liked the program).

0.8181818182%*110=90 degrees

4 0

3 years ago

Which is an example of a chemical change ​

Which is an example of a chemical change