Use commutative property to write an expression equivalent to 5 + 7 + 9

ASAP

What number should be added to both sides of the equation to complete this square? x^2-10x=7

Aboat costs 19200 and decreases in value by 12% per year. how much will it cost in 5 years

Students are given 3 minutes to complete each multiple-choice question on a test and 8 minutes for each free-responsequestion. there are 15 questions on the test and the students have been given 55 minutes to complete itwhich value could replace x in the table? 5507-m23-m8(15-m)8(15)-m