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charle [14.2K]
3 years ago
7

Can someone please help me f(x) = -3x + 20; f(8)

Mathematics
2 answers:
Andreyy893 years ago
4 0
You take 8 & drop it in wherever x appears

-3x + 20
= -3(8) + 20
= -24 + 20
= -4
Anvisha [2.4K]3 years ago
3 0

Answer:

-4

Step-by-step explanation:

the function simplified is -4 i have no way to explain just trust

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Put the following values in order from smallest to largest. 40% 1/4 1/3 0.3 85% 0.08
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Answer:

0.08

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1.3

40%

85%

Step-by-step explanation:

Try converting all of these numbers to decimal. 40% would be 0.4, 1/4 would be 0.25, 1/3 would be 0.3 repeating, and 85% would be 0.85. From there, reordering the numbers is pretty easy.

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7.96 rounded to the nearest tenth
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Solve 2(x – 11)2 = 128.
Andrew [12]

Answer:

Step-by-step explanation:

Multiply the numbers     2 ( x - 11 ) * 2 = 128

                                          4 ( x - 11 ) = 128

Distribute              4 ( x - 11 ) = 128

                                 4x - 44 = 128

Add 44 to both sides              4x - 44 = 128

                                                    4x - 44 + 44 = 128 + 44

Simplify                        - Add the numbers    

                                        4x - 44 + 44 = 128 + 44

                                            4x = 128 + 44

                                        - Add the numbers

                                  4x = 128 + 44

                                   4x = 172

Divide both sides by the same factor                    4x = 172

                                                                                 4x/4 = 172/4

Simplify

-     Cancel terms that are in both the numerator and denominator

                                                                4x/4 = 172/4

                                                                     x = 172/4

-Divide the numbers

                                                           x = 172/4

                                                             x = 43

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Solve (1/3)² ÷ (1/3)⁷ = 3ⁿ ​
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Answer:

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Step-by-step explanation:

(1/3)^2 divided by (1/3)^7 = 243

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Solve system of equation by elimination:
mars1129 [50]

Answer:

a. (4, 1)

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>Algebra I</u>

  • Solving systems of equations using substitution/elimination

Step-by-step explanation:

<u>Step 1: Define Systems</u>

-x + 4y = -8

-5x - 4y = -16

<u>Step 2: Solve for </u><em><u>x</u></em>

<em>Elimination</em>

  1. Combine equations:                     -6x = -24
  2. Isolate <em>x</em>:                                        x = 4

<u>Step 3: Solve for </u><em><u>y</u></em>

  1. Define equation:                   -x + 4y = -8
  2. Substitute in <em>x</em>:                      -4 + 4y = -8
  3. Isolate <em>y</em> term:                       4y = -4
  4. Isolate <em>y</em>:                                y = -1
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