Which expressions are equivalent to (5⋅x)⋅3 ? drag and drop the equivalent expressions into the box 3⋅(5⋅x) 5⋅3+x⋅3 5⋅(x⋅3) 15x 5⋅3⋅x⋅3

First option.

Third option.

Fourth option.

Step-by-step explanation:

For this exercise is important to remember that equivalent expression have the same value.

Then given the following expression provided in the exercise:

You can find equivalent expression by:

-  Changing the position of :

    (This matches with the first option)

- Solving the multiplication indicated. Then:

     (This matches with the fourth option)

- Writting inside the parentheses:

    (This matches with the third option)

4

step-by-step explanation:

time is equal to distance over rate so

t = d/r

need a little bit more information for the second question.