Tinkets:

now the next step

since you know x, you're able to substitute

so trinket: $7.5
doodad: $4.375
lets hope i got the numbers correct but i got 6.3956949e+12
Answer:
All your steps are correct. Well done!
Answer:
-$0.90
Step-by-step explanation:
There are only two possible outcomes, winning $23 (W) or losing $15 (L). Therefore:

The probability of the player making his next 3 free throws (P(W)) is:

The probability of the player NOT making his next 3 free throws (P(L)) is:

Expected value (EV) is given by the payoff of each outcome multiplied by its probability:

The expected value of the proposition is -$0.90
Answer:
$1.36
Step-by-step explanation:
First, add together the prices of all the clothes:
18.28 + 42.39 + 12.97
= 73.64
Then, subtract this from 75:
75 - 73.64
= 1.36
So, he will have $1.36 left after buying the clothes