Alejandro needs to buy bird seed from the local pet store for his parrots. a 10 lb. bag of bird seed costs $12.55. the pet store also sells loose bird seed for $1.49 per pound. the sales tax is already included in these prices. alejandro wants to buy a 10 lb. bag of bird seed and some loose bird seed. if he has $20, how many pounds of loose bird seed can he buy after purchasing the 10 lb. bag?

First take note he only has $20 and the bag he must buy is $12.55. Also the loose seeds are $1.49 per pound.

To solve subtract 12.55 from 20

20-12.55=7.45

So after buying the 10 lb bag he has $7.45 left now divide that by 1.49

7.45/1.49=5

So after buying the 10 lb bag he can also buy 5 lb of the loose seeds!

d. bc = 12 and ef = 16

step-by-step explanation:

we are given that δabc : δdef such that .

also, it is given that

so, from the options, we need that .

a.

b.

c.  

d.

as, we can see that only option d gives the same ratio as i.e. .

hence, the possible lengths are bc = 12 and ef = 16.