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Angelina_Jolie [31]
2 years ago
7

Evaluate 5x-3y when x=7 y=1/3

Mathematics
2 answers:
pogonyaev2 years ago
6 0

Answer:

34

Step-by-step explanation:

(5*7)-(3*1/3) =

35-1 = 34

Fynjy0 [20]2 years ago
4 0

Answer:

34

General Formulas and Concepts:

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

  1. Brackets
  2. Parenthesis
  3. Exponents
  4. Multiplication
  5. Division
  6. Addition
  7. Subtraction
  • Left to Right

Step-by-step explanation:

<u>Step 1: Define</u>

5x - 3y

x = 7

y = 1/3

<u>Step 2: Evaluate</u>

  1. Substitute:                    5(7) - 3(1/3)
  2. Multiply:                        35 - 1
  3. Subtract:                       34
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Step-by-step explanation:

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is:

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Now we draw again a green marble, now there are 3 green marbles and 5 total marbles in the jar, so this time the probability is 3/5

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The joint probability is:

P(2) = (4/6)*(3/5)*(2/4) = (2/6)*(3/5) = 1/5

The probability of drawing 3 green marbles (X = 3)

At this point you may already understand the pattern:

First, we draw a green marble with a probability 4/6

second, we draw a green marble with a probability 3/5

third, we draw a green marble with a probability 2/4

finally, we draw a red marble with a probability 2/3

The joint probability is:

P(3) = (4/6)*(3/5)*(2/4)*(2/3) = (2/6)*(3/5)*(2/3) = (1/5)*(2/3) = (2/15)

Finally, the probability of drawing four green marbles (X = 4) is given by:

First, we draw a green marble with a probability 4/6

second, we draw a green marble with a probability 3/5

third, we draw a green marble with a probability 2/4

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The joint probability is:

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The expected value will be:

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So we can expect to draw 1.33 green marbles in this experiment.

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