The perimeter of an irregular shape with 4 sides is 21 centimeters. Three of the side
lengths are 4 centimeters, 2 centimeters, and
6 centimeters. What is the length of the
unknown side?

HELPP

b

step-by-step explanation:

the equation of a line in point- slope form is

y - b = m(x - a)

where m is the slope and (a, b) a point on the line

calculate m using the slope formula

m = (y₂ - y₁ ) / (x₂ - x₁ )

with (x₁, y₁ ) = (0, 4) and (x₂, y₂ ) = (3, - 5) ← 2 points on the line

m = = = - 3

with m = - 3 and (a, b) = (3, - 5), then

y - (- 5) = - 3(x - 3), that is

y + 5 = - 3(x - 3) → b

2 pecks

step-by-step explanation:

d is ur answer hopes this i dont really know how to explain it to u.