4x²-9y², 8x³ - 27y³ and (2x-3y)²
1 answer:
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Answer:
$13.16
Step-by-step explanation:
For each individual spin, there are two possible outcomes:
- There is a 1 in 38 chance of winning $175.
- There is a 37 in 38 chance of losing $5.
The expected value for each spin is the sum of the products of each outcome by their respective probability.
In 50 spins, the expected value is:
You can expect to lose $13.16 if you spin the wheel 50 times.
Answer:
y = + 4
Step-by-step explanation:
y² - x = 7 ← substitute x = 9 into the equation
y² - 9 = 7 ( add 9 to both sides )
y² = 16 ( take square root of both sides )
y = ± = ± 4
the positive value of y when x = 9 is + 4