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DochEvi [55]
3 years ago
5

In a smoking survey among boys between the ages of 12 and 17, 78% prefer to date nonsmokers, 1% prefer to date smokers, and 21%

don’t care. Suppose seven such boys are selected randomly. Let X equal the number who prefer to date nonsmokers and Y equal the number who prefer to date smokers. (a) Determine the joint pmf of X and Y. Be sure to include the support of the pmf. (b) Find the marginal pmf of X. Again include the support.
Mathematics
1 answer:
Ganezh [65]3 years ago
4 0

Answer:

i think it is a

Step-by-step explanation:

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4x+1=2x+11 what is the value of x
egoroff_w [7]
X = 5!

4x+1=2x+11
-1 -1 (Subtract 1 from both sides)
4x =2x+10
-2x -2x (Subtract 2x from both sides)
2x = 10
—— ——
2x 2x (Divide both sides by 2x)

X = 5
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16 + 32 ÷ 4 + (10 - 6)2
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How do you write 1.801 as a percentage
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180.1%

Step-by-step explanation:

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What fraction is equivalent to 0.333333
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The <span>fraction is equivalent to 0.333333 is 1/3. </span>
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What is the value of the expression when s=2 and t=1.5 -3|5-s3|+3t​
Anuta_ua [19.1K]

Answer:

-4.5

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<u> </u>

<u>Algebra I</u>

  • |Absolute Value| - makes any negative number positive

Step-by-step explanation:

<u>Step 1: Define</u>

-3|5 - s³| + 3t

s = 2

t = 1.5

<u>Step 2: Evaluate</u>

  1. Substitute in variables:                                                                                     -3|5 - 2³| + 3(1.5)
  2. |Absolute Value| Exponents:                                                                            -3|5 - 8| + 3(1.5)
  3. |Absolute Value| Subtract:                                                                               -3|-3| + 3(1.5)
  4. Absolute Value:                                                                                                -3(3) + 3(1.5)
  5. Multiply:                                                                                                             -9 + 4.5
  6. Add:                                                                                                                   -4.5
6 0
2 years ago
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