4 21. The area A of an equilateral triangle with
side length sis A=
$273. Use an integer
estimate for 3 to find the sum of areas of
the equilateral triangles shown below to the
nearest whole square centimeter. NMP

tangent

step-by-step explanation:

c. y = 1/4 x + 5

step-by-step explanation:

first, put the equation of the line on the graph into slope-intercept form

(y = mx + b):   y = -4x + 8

second, a perpendicular line has to have "an opposite/reciprocal slope" to the original slope. so, find the "m" value in your original equation (it's -4, right? )

original slope: m = -4   perpendicular slope: change the sign to its opposite and find the reciprocal ("flip" the number)

new slope is now positive (b/c the original slope was negative 4), and it's 1/4 (not the original slope of 4 or 4/1)

a = 3.14

b = 18

c = 18/5 or 3.6 or 3 3/5

step-by-step explanation: