3 pens cost $15. What will 30 pens cost?

Answer:

How long does it take the students in my class to travel to school?

Step-by-step explanation:

A statistical question is one that can be answered by collecting data and where there will be variability in that data.

for question number 1 the answers are;

x^2 - 2x + 1 and x^2 +2x +1

cause if you factor it you get a perfect square: (x -1)(x-1) and (x+1)(x+1)

For question number 2 the answers are:

16x^2 + 24x + 9 and 16x^2 +9

cause if you factor it would be: (4x +3)(4x +3) or (4x+3)^2

Maggie is not correct.

Further explanation:

Given that Mr. House wrote 8 tenths minus 5 hundredths on the board.

Now, Maggie said that the answer is 3 hundredths because 8 minus 5 is equal to 3.

Our aim is to find whether Maggie is correct or not.

From place value chart, 10 tens is equal to 1 hundreds.

Then 3 hundreds is equal to 30 tens and 3 hundreds can be written as follows:

30 tens can be written as follows:

From place value chart it is observed that tenths is greater hundredths.

Tenths are one place after the decimal and hundredths are two places after the decimal.

Eight tenths can be written in the form of decimal as follows:

Five hundredths can be written in the form of decimal as follows:

Now, subtract five hundredths from eight tenths as follows:

Then 8 tenths minus 5 hundredths can be written in the form of hundredths as follows:

Therefore, 8 tenths minus 5 hundredths is equal to 75 hundredths.

From the above explanation we can Maggie is not correct.

Thus,  Maggie is not correct.

Learn more:

1. Learn more about equations brainly.com/question/788903

2. Learn more about algebraic expression brainly.com/question/5533462

3. Learn about place value chart brainly.com/question/1822996

Answer details:

Grade: Middle School

Subject: Mathematics

Chapter: Numbers

Keywords:

Maggie, Mr. House, hundreds, thousands, hundredths, thousandths, place value chart, decimal, greater, error, equivalent, numbers.