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monitta
4 years ago
6

Which expression is equivalent to 19 - 27 a. 27 - 19 b. -19 + 27 c. 19 + -27 d. -19 + 27

Mathematics
2 answers:
Aliun [14]4 years ago
7 0

Answer:

<h2>c. 19 + -27</h2>

Step-by-step explanation:

We know:

a - b = a + (-b)

a + b = b + a

19 - 27 = 19 + (-27) = (-27) + 19 = -27 + 19

never [62]4 years ago
7 0

Answer:

c.19 + -27

Step-by-step explanation:

you do kcc (keep change change) and you keep the first number flip the sign and then change the positive 2 a negative

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How do i solve this equation<br> -4p+9=-5
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Answer:

p = 7/2

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

  • Multiplication Property of Equality
  • Division Property of Equality
  • Addition Property of Equality
  • Subtract Property of Equality

Step-by-step explanation:

<u>Step 1: Define</u>

-4p + 9 = -5

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

  1. Subtract 9 on both sides:                     -4p = -14
  2. Divide -4 on both sides:                       p = 7/2

<u>Step 3: Check</u>

<em>Plug in p into the original equation to verify it's a solution.</em>

  1. Substitute in <em>p</em>:                    -4(7/2) + 9 = -5
  2. Multiply:                               -14 + 9 = -5
  3. Add:                                     -5 = -5

Here we see that -5 does indeed equal -5.

∴ p = 7/2 is the solution to the equation.

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3 years ago
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