proportions, grade 9, question 16
a) Find the dimensions of a rectangle that are proportional to 7 and 5 knowing that the perimeter is 96.
b) Deduce the area of a rectangular carpet of the same dimensions.
c) If 20% of this carpet is red, denote by x the area of the carpet and by y the red area.
Express y interms of x.
d) Deduce the value of the red area.