In the graphic below, the measure of angle abc is:
a. 143
b. 90
c. 37
d. 127

Select all the correct answers. what is 221,000,000,000,000,000,000 expressed in scientific notation?

Alonso walked with his friend andy one day, and wanted to compare their speeds. alonso walked 3 miles in one hour, and andy walked 2 miles in 2 hours. complete the table to graph the relationship for each person.

What is the best way to answer questions with a x expression in the question. for example 3x + 10x=?