А The diagram represents the starting position (AB) and the
finishing position (CD) of a ladder as it slips. The ladder is
leaning against a vertical wall.
Given: AC = x, OC = 4AC, BD = 2AC and OB = 5 m.
Forin an equation in x, find x and hence find the length of the
ladder.
0
B
D

-3.5 degrees per hour

step-by-step explanation:

find the unit rate:

-12   1/4 degrees           12.25 degrees

= - = -3.5 degrees per hour

      3   1/2 hours               3.5 hours

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