In a survey of 158 pet owners, 66 said they own a dog, and 89 said they own a cat. 22 said they own both a dog and a cat. how many owned neither a cat nor a dog?

  25

Step-by-step explanation:

66 - 22 = 44 own a dog, but not a cat

89 - 22 = 67 own a cat, but not a dog

The number that own a dog, cat, or both is ...

  44 + 67 + 22 = 133

So, the number that own neither is ...

  158 - 133 = 25

10/60

step-by-step explanation:

if you divide 10 by 60 the answer is 0.166666 while if you divide or solve the other problems it equals 0.6

, and

for

step-by-step explanation:

we can analyze the pattern at which the terms increase. let us denote , , , so that we can call

note the following:

the pattern: to get the next term value, we just add the next term number (e.g. 1st, 2nd, to the previous term value (term values are the given numbers in the question, 1, 3, 6, 10, 15,

from , to get to , we add

from , to get to , we add

etc.

we need to form a recursive formula, a formula that has the next term as a function of the previous term. so a possible recursive formula can be

, and for