Arlene is showing her work in simplifying -7.9 + 8.2 - 3.4 + 2.1 identify any errors in her work or in her reasoning. IF YOU ANSWER ILL GIVE YOU ALL POINTS -7.9 + 8.2 - 3.4 + 2.1 original form

-7.9 + 8.2 + (-3.4) + 2.1 Additive inverse

-7.9 + (-3.4)) + 8.2 + 2.1 Associative property

(-7.9 + (-3.4)) + (8.2 + 2.1)
Commutative property

-11.3 + 10.3 simplify

-1 simplify

Which is equivalent to 10/12? options: 10/18 5/6 3/12 9/11

The equation of a circle is (x + 4)2 + (y + 6)2 = 16. determine the length of the radius. 10 4 16 8 my flower basket delivers flowers within a 20 mile radius of their store. if this area is represented graphically, with my flower basket located at (5, 2), what is the equation that represents the delivery area? (x - 2)2 + (y - 5)2 = 20 (x - 5)2 + (y - 2)2 = 20 (x + 5)2 + (y + 2)2 = 400 (x - 5)2 + (y - 2)2 = 400

The standard deviation for a set of data is 5.5. the mean is 265. what is the margin of error?