What is mathematics? :)

What is 20+(5 x 2/5 )+ 3 show your work

25 ! the line of best fit is h = 5a + 86. predict the height at age 16.

The owners of four companies competing for a contract are shown in the table below. if a report is released that advocates company b, which of the people having funded the report should result in the most skepticism? company owner of company company a jake adams company b company c company d debby smith henry rose rhonda baker o a. jake adams o b. rhonda baker o c. debby smith o d. henry rose