The pairs of goldfish Tasha can buy for $20 are

Step-by-step explanation:
To find the how many type of goldfish that Tasha can buy for $20 is the set of positive ordered pairs.
Let x denote the number of fancy goldfish.
Let y denote the number of common goldfish.
To find how much goldfish can Tasha buy for $20 is to substitute the value for x in the equation 
Now, substituting
in
, we get,

The ordered pair is 
Similarly, substituting
,

For
,

For
,

For
,

For
,

For
,

Thus, the pairs of goldfish Tasha can buy for $20 are 

Answer:
a.The expected value of the game to the player is -$0.2105
b. The player should expect to lose $210.50¢ if he/she places the bet or plays the game 1,000 times
Step-by-step explanation:
Please kindly check the attached files for explanation.
ANSWER:
1/2
EXPLANATION:
Plug this into calculator -->
(1/64) ^ (1/6) and you will get exactly
0.5 which is equal to 1/2
*Note = this can also be done by changing it to...
⁶√[1/64]
If you know this root (2⁶ = 64) then it is 2, and 1 over 2 is equal to one half
$55 this is shown by doing 80/100=0.80. and 0.80*55=this is the answer