2 years ago

Given f of x is equal to 2 divided by the quantity x squared plus 3x minus 10 end quantity, which of the following is true?

Mathematics

1 answer:

BigorU [14]2 years ago

7 0

Step-by-step explanation:

hope you can understand

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A wall has an area of 40 square feet. Its height is 8 feet. Which equation could you use to find its width?

lord [1]

Answer:

40/8=5

Other side length = 5

Step-by-step explanation:

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3 years ago

Which rational number represents a decrease in water level from 8 feet to 6 feet?

Alexxx [7]

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3 years ago

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HELP please!! “Find the volume of the sphere rounded to the nearest hundredth

zvonat [6]

Answer:

904.32 cm^3

Step-by-step explanation:

The formula for the volume of a sphere is V=4/3πr³. Since r is given, we can plug that in for r. I'm assuming that we are using 3.14 for pi, so when we plug in all the values in the equation we get V = 4/3*3.14*6³, which solves out to 904.32.

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3 years ago

Find the expected value of the winnings from a game that has the following payout probability distribution: Skip Payout ($) 1 2

Nezavi [6.7K]

Answer:

$4.35

Step-by-step explanation:

The expected value of a random variable X, often denoted as E(X), indicates the probability-weighted average of all possible values/events. The general formula of expected value is

$\mathrm{E(\textit X \mathrm)} = \displaystyle\sum_{\mathclap{i=1}}^{k} \ X \times P(X) \\ \\ \\ = X_{1} \times P(X_{1}) \ + \ X_{2} \times P(X_{2}) \ + \ X_{3} \times P(X_{3}) + \ \cdots \ + X_{k} \times P(X_{k})$ .

Therefore, the expected value of the winnings from a game is

$\mathrm{E(\textit X \mathrm)} \ = \ 1 \times 0.35 \ + \ 2 \times 0.2 \ + \ 5 \times 0.1 + \ 8 \times 0.2 \ + 10 \times 0.15 \\ \\ = \ 4.35 \ \ (\mathrm{nearest \ hundredth})$ .

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2 years ago