Answer:
Rational numbers:
- 3^-1
- pi
- 6.66... (The one that has a line above it)
An irrational number has endless non-repeating digits to the right of the decimal point.
Answer:
21
Step-by-step explanation:
50 - 23.75 = 26.25
26.25 ÷ 1.25 = 21
Answer:
The error is: The solution shows the Sam's age and the problem asked for Micaela's age.
Solution fixed: 
Micaela is 17 years old now.
Step-by-step explanation:
The error is: The solution shows the Sam's age and the problem asked for Micaela's age.
To fix the error, you can set up these equations based on the information given:
Solve for "s" from the first equation:
Substitute this equation into the second equation:
Now you need to solve for "m":
Micaela is 17 years old now.
I would recommend "Introduction to Linear Algebra," by Gilbert Strang. It is a compact but very helpful textbook reference written by a well-known MIT professor. There is a corresponding online MIT course that is free, so that's a bonus. I am currently using it to study linear algebra with no class or previous experience, and I think it does a solid job of explaining things. Each section in the book has a set of questions for you to work through, and answers to selected questions appear in an appendix at the end of the book.
Hope this helps!
