At the idaho humane society there is a ratio of 9 cats 13 dogs . if there are a total of 66 cats and dogs how many are cats ?

27 cats.

Step-by-step explanation:

The fraction of cats = 9 / (9 + 13) and dogs = 13 / ( 9 + 130

= 9/22 and 13/22

So the number of cats = (9/22) * 66

= 9 *3

= 27.

=

hello from mrbilldoesmath!

answer:

a(n) - a(n-1) -3

discussion:

this ones a bit interesting. given a(n) = 5 - 3n consider this:

a(n-1) = 5 - 3(n-1)

          = (5 - 3n) + 3             => but a(n) = 5 - 3n, the first term

          = a(n)   + 3                 => subtract 3 from both sides

a(n-1) -3 = a(n)  

or

a(n) - a(n-1) -3

you,

mrb

depending on others is critical to survival. my source is apex!

step-by-step explanation: