Melody stated that the sum of a positive and a negative integer equals a negative integer or 0.
use these numbers to answer the questions:
–7, 3, 8, –5, 7
(a) is this statement always true, sometimes true, or always false? write three equations to support your answer.
(b) pretend that you need to explain to a friend what happens how you determine whether a sum will be positive, negative, or 0 when adding a positive and a negative decimal.

If private savings 'v' = 0.75s and total savings 's' equals $4.20 billion, solve for public and private savings.

The school track has eight lanes. each lane is 1.25 meters wide. the arc at each end of the track is 180. the distance of the home straight and the radii for the arcs in the 1st 4 lanes are given. s=85m r1=36.5m r2=37.75m r3=39m r4=40.25m part one: find the radii of lanes 5 through 8 of the track. show your work. part two: if max ran around lane one, how far did he run? show your work and explain your solution. part three: max wants to run a total of three laps around the track, choose two additional lanes (2-8) for him to run and find the distance around those two lanes. show your work and round to the hundredths. part 4: based on your lane choices in part three, what was the total distance max ran in the three laps around the track?

Right ∆abc has coordinates a(-7, 3), b( -7, 10), and c(-1, 3). the triangle is reflected over the x - axis and then reflected again over the y - axis to create ∆a'b'c'. which are the coordinates of vertex a'?