4. A mini size chocolate bar is x grams. A large chocolate bar is three times larger than the normal bar.
A normal size chocolate bar is 80g smaller than the large chocolate bar.
All together the three chocolate bars weigh 480g.
(a) Form a simplified equation in terms of x
(b) Solve the equation and work out the weight of each chocolate bar.

b

step-by-step explanation:

b

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