(i will give Brainliest) a home security company provides security systems for 5$ per week, plus an installation fee, the total fee for 12 weeks of service is 210$. write and solve a linear equation to find the cost of the installation fee. (show work)

check the picture below.

well, the angle at the vertex d is clearly not a right-angle, let's check for the one at the vertex f which does look like,   however if it's indeed, that means ef is perpendicular to df, in which case their slopes will be negative reciprocal of each other.

so the negative reciprocal of the slope of ef is 1, however the slope of df is not 1, is 1/2, so nope, they're not perpendicular lines.

hello :

70y^8 + 30y^6 = 2 ( 35 y^8 + 15y^6)

the lenght is : 35 y^8

the width is : 15y^6

21

step-by-step explanation:

irrational, cannot