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Leni [432]
3 years ago
6

2(x + 7) + r = 20 distributive property

Mathematics
2 answers:
shutvik [7]3 years ago
7 0

Answer: 2x+14+r=20

Step-by-step explanation:

2(x+7)+r=20

Multiply the x and the 7 by 2

2x+14+r=20

Marianna [84]3 years ago
5 0

Answer:

r = -2x+6

Step-by-step explanation:

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Answer:

thxs

Step-by-step explanation:

8 0
3 years ago
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Ay-by=c <br> solve for "y"
True [87]
\sf Ay-by = c\\\\ Factor~out~y\\ y(A-b) = c\\\\ Divide A-b~on~both~sides\\y = \frac{c}{A-b}
4 0
3 years ago
Steven gets a weekly allowance of $14. He spends $2 each week on treats for his little sister.
Aloiza [94]

Answer:

4$

Step-by-step explanation:

First, you have to subtract 2 dollars for his sister.

Then, you are left with 12 dollars. If he splits it equally into three groups, then the answer is 4, as you divide 12/3

8 0
3 years ago
-3x-3y=3 ,y=-5x-17 solving systems by substitution
Law Incorporation [45]

Answer:

(-4, 3)

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

Equality Properties

<u>Algebra I</u>

  • Solving systems of equations by substitution/elimination

Step-by-step explanation:

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

-3x - 3y = 3

y = -5x - 17

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

<em>Substitution</em>

  1. Substitute in <em>y</em>:                    -3x - 3(-5x - 17) = 3
  2. Distribute -3:                       -3x + 15x + 51 = 3
  3. Combine like terms:           12x + 51 = 3
  4. Isolate <em>x</em> term:                     12x = -48
  5. Isolate <em>x</em>:                              x = -4

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

  1. Define equation:                    y = -5x - 17
  2. Substitute in <em>x</em>:                       y = -5(-4) - 17
  3. Multiply:                                  y = 20 - 17
  4. Subtract:                                 y = 3
8 0
3 years ago
B is the midpoint of AC . AB=8V, and AC=2V +42. what is BC
rodikova [14]
Ab and bc are equal.
Automatically bc = 8v
8v + 8v = 16v
16v = 2v + 42
14v = 42
V = 3
8(3) + 8(3) = 2(3)+42
48=48
Bc = 8v

8 0
3 years ago
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