Julie wants to make 800g of a 15% alcohol solution by mixing 20% solution and a 4% solution. how many grams of each kind does she need? if a 20% and a 4% alcohol solution weigh x g and y g respectively

step-by-step explanation:

i used to know how to do this in 7th but i forget easily

step-by-step explanation:

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