In+a+city,+40%+of+people+have+black +hair,+30%+have+blue+eyes,+12%+have +both. +what+is+percentage+of+people+who+h ave+neither+black+hair+or+blue+eyes ?.

step-by-step explanation:

given that there are two triangles j'k'l' and jkl>

the former is got by dilating the second one.

when drawn on a grid, (graph paper) coordinates of vertices of first triangle is

(6,12)j, (9,6)k and (12,9)l

side jk has length = distance between j and k

=

side j'k'=distance between j' and k'

=

ie j'k'l' has sides 1/3 of that of corresponding sides of jkl.

hence scale factor of 1/3 is used to get j'k'l'from jkl

1^3 + 2^3 + 3^3 +4^3 = (1+2+3+4)^2

step-by-step explanation:

i am only able to answer the first part. i am not sure about the second part. sorry

x= cost per bracelet

number of bracelets * x + shipping charge = total cost

so

9x+9=72