Variable Notations Exercises

Answer

y⁵

Answer

qr, q × r, q · r, (q)(r)

There may be other correct answers. However, you don't need to go all over-achiever on us. These four are sufficient.

Answer

When multiplying a variable by a number, we write the number first. We could write 5y to mean "y times 5." We could also write y · 5, (y)(5), or y × 5, but these expressions are all longer than 5y. In this instance, shorter is better.

Answer

y²