Ok do the original price minus the new price. 90-55=35. Divide that by the original number and multiply it by 100 to find the price decrease. 35/90=.3888*100=38.89
Factor this by grouping. Group the first two terms together and then the second 2 terms together. The idea here is that, after grouping, what you can pull out in both groups is the same. Like this:

Now work on finding a common thing between the 2 groups:

See, what you have in common there now is the (x-9) that you can factor out:

And that is factored completely.
Answer:
A and B
Step-by-step explanation:
A) Collect like terms
0=0
B) Collect like terms
0=0
A and B both correct
C. There were 5 footballs sold for every 2 basketballs. to check just multiply 2 times 2.5 and you get 5. Hope this helped
Answer:
p : q : r = 10 : 4 : 3
Step-by-step explanation:
Expressing the ratio in fractional form
=
( cross- multiply )
4r = 3q ( divide both sides by 4 )
r =
q =
× 2 = 
Then
p : q : r
= 5 : 2 :
( multiply all parts by 2 )
= 10 : 4 : 3