Which expression could be used to determine the distance between 18 and (-90) on a vertical number line? Explain why a.) |18 + (-90)| b.) |18 – (-90)| c.) |90 – 18| d.) 18 – 90

What is the relationship between all triangles that can be drawn given the same three angles

Standard deviation of 19,29,21,22,23

In a two-digit number the units' digit is 7 more than the tens' digit. the number with digits reversed is three times as large as the sum of the original number and the two digits. find the number.