The two rectangles below are similar
first one (bottom is 12 cm, and right side is 5 cm)
Second one(Bottom (2x + 8)cm) right side x cm)

Its not C because thats the answer i used and i got it wrong

Question

The two rectangles below are similar
first one (bottom is 12 cm, and right side is 5 cm)
Second one(Bottom (2x + 8)cm) right side x cm)

Its not C because thats the answer i used and i got it wrong

campbell_st · Answer

you need to use the ratio or corresponding sides in similar rectangles.  Which will be in the same ratio

$$\frac{2x + 8}{12} = \frac{x}{5}$$

cross multiply and then solve for x