Simplify the following expression.
-21 - (-11)

-10

Step-by-step explanation:

well you know that

so we have

Ayala biked approximately 23 miles in total

Step-by-step explanation:

Great question, it is always good to ask away and get rid of any doubts that you may be having.

To solve this question we need to calculate the total amount of miles that Ayala biked. To do this we need to add the amount of miles she biked on each day. Like so,

As we can see in the calculation above, Ayala biked 22.75 miles but the question now asks us to round to the nearest whole number. Since the first digit to the right of the decimal is a 7 then we need to round up.

Therefore, Ayala biked approximately 23 miles in total.

I hope this answered your question. If you have any more questions feel free to ask away at