Mr. Duc asked perry to set up 450 chairs in a large hall perry puts 20 chairs in each row he has already set up 15 rows of chairs how many more chairs must he set up

Which addition property is being illustrated below? (type commutative or associative) (6 + 7) + 1 = 6 + (7 + 1)

9. (y^-5)^10y^10 a. y^-60 b. y^60 c. y^-150 d. y^150 find the simplified form of each expression. 10. (4/7^5)^2 a.8/14^10 b.16/49^25 c.16/49y^10 d.8/14y^25 11. determine if the number 3.43 times 10^-6 is written in scientific notation. if not, explain. a. yes; the number is written scientific notation. b. no; the first factor is not a number between 1 and 10. c. no; it is not written as a number times a power of 10

The sum of the reciprocal of a positive number and the reciprocal of 2 more than the number is 3/4 equation: the number is