i have 4 math problems 8th grade level please help!

Question

anonymous · Answer

attachment

anonymous · Answer

please show your work

mathstudent55 · Answer

10.
An irrational number is a number that cannot be written as a fraction of integers.

mathstudent55 · Answer

Look at the 3 numbers in problem 10a
12/144 is a fraction of integers. Is it irrational?

anonymous · Answer

idk

mathstudent55 · Answer

Read this carefully:
An irrational number is a number that cannot be written as a fraction of integers.

mathstudent55 · Answer

Do you know what integers are?

anonymous · Answer

thanks and sorta

mathstudent55 · Answer

Ok. Integers are the whole numbers: 0, 1, 2, 3, 4, ...
and the negatives of the whole numbers: -1. -2. -3, ...
The set of integers is:
{..., -4, -3, -2, -1, 0, 1, 2, 3, 4, ...}
Ok?

anonymous · Answer

ok

mathstudent55 · Answer

In other words, the integers are all whole numbers, zero, and all negatives of whole numbers.

mathstudent55 · Answer

Now we need to define a rational number.
A rational number is a number that can be written as a fraction of integers.

anonymous · Answer

k

mathstudent55 · Answer

If you have a fraction, and the numerator and denominator are integers, the number is a rational number.

anonymous · Answer

ok

mathstudent55 · Answer

Even if the number is not written as a fraction of integers, as long as it CAN be written as a fraction of integers, it is still a rational number.

anonymous · Answer

k

mathstudent55 · Answer

Here are examples of rational numbers:
|dw:1414452070082:dw|