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Angelina_Jolie [31]
3 years ago
7

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

Mathematics
2 answers:
pogonyaev3 years ago
6 0

Answer:

34

Step-by-step explanation:

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

35-1 = 34

Fynjy0 [20]3 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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A special type of door lock has a panel with five buttons labeled with the digits 1 through 5. This lock is opened by a sequence
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There are several ways the door can be locked, these ways illustrate combination.

There are 3375 possible combinations

From the question, we have:

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Each of the three actions can either be:

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<em />

The number of ways of pressing a button is:

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Apply combination formula

\mathbf{n_1 = \frac{5!}{(5-1)!1!}}

\mathbf{n_1 = \frac{5!}{4!1!}}

\mathbf{n_1 = \frac{5 \times 4!}{4! \times 1}}

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The number of ways of pressing a pair is:

\mathbf{n_2 = ^5C_2}

Apply combination formula

\mathbf{n_2 = \frac{5!}{(5-2)!2!}}

\mathbf{n_2 = \frac{5!}{3!2!}}

\mathbf{n_2 = \frac{5 \times 4 \times 3!}{3! \times 2 \times 1}}

\mathbf{n_2 = 10}

So, the number of ways of performing one action is:

\mathbf{n =n_1 + n_2}

\mathbf{n =5 + 10}

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For the three actions, the number of ways is:

\mathbf{Action = n^3}

\mathbf{Action = 15^3}

\mathbf{Action = 3375}

Hence, there are 3375 possible combinations

Read more about permutation and combination at:

brainly.com/question/4546043

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