Which expression is equivalent to 10 + -6

An investment decreases in value by 30% in the first year and decreases by 40% in the second year. what is the percent decrease in percentage in the investment after two years

The length of the line segment joining the midpoints of sides ab and bc of the parallelogram abcd is 10. find the length of diagnol ac

This summer the number of tourists in salem increased 4.5% from last years total of 426000. how many more tourists came to salem this summer