A science class is timing how long it takes an object to hit the ground. When the object fell, its elevation
changed a total of – 4.9 min 0.71 s.
Which rational number represents the average change in elevation of the object, in meters per second?
-4.9
-0.71
4.9
1
-4.9
0.71

4n=2m

ratio of m to n: 2/4 = 1/2

answer

a. 1/2

2 equivalent expressions to represent the area of a rectangle and the top is n-3 and the side is 2

area of the rectangle = length * width

given length = n - 3

width = 2

replace it in the area

so area of the rectangle = (n-3) *2

= 2(n-3)

one of the expression is 2(n-3)

to get another expression we distribute 2 inside the parenthesis

2(n-3) is 2n - 6

so another expression is 2n - 6

two equivalent expression are

2(n - 3)   , 2n - 6