To find the area of the shape which is the shaded area I assume: we must find the sum of the area of the rectangle AECD and triangle BEC
Total Area =area of rectangle AECD + triangle BEC
= 9 * 15 + (1/2) * 6 * 15 = 136 + 45 = 181 square milimeters
Hope that helped!
The answer is 160 because they are proportions if you multiply 9 by 20 it will give you 180 so if you multiply 8 by 20 it will give you 160.
15(5) , 25(3) , 75(1)
That said
a.This set of vectors are not basis for vector space for two-dimentional space R2 due to high number of vectors (3). It means three vector is two much to span 2-dimentional space.
b.This set of vectors are not basis for vector space for three-dimentional space R3 due to small number of vectors (2). It means two vector can't span three-dimentional space.
The answer to the question is: -9n+17