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ratelena [41]
2 years ago
15

HELP PLEASE!!! I WILL FIVE STAR!!

Mathematics
2 answers:
Anna007 [38]2 years ago
6 0

The sum of all angles in any triangle is 180°.

\beta=180-(\alpha+\gamma)

\beta=180-(72+63)

\beta=180-135=\boxed{45}

e-lub [12.9K]2 years ago
4 0

Answer: The answer here is 45* because all you need to do is 180-72-63 then BAM you get your answer :)

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Solve the following system of equations by substitution
WITCHER [35]

Answer:

(-1, 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  

Equality Properties

  • Multiplication Property of Equality
  • Division Property of Equality
  • Addition Property of Equality
  • Subtraction Property of Equality<u> </u>

<u>Algebra I</u>

  • Terms/Coefficients
  • Coordinates (x, y)
  • Solving systems of equations using substitution/elimination

Step-by-step explanation:

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

y = 2x + 3

y = x + 2

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

<em>Substitution</em>

  1. Substitute in <em>y</em>:                                                                                                  2x + 3 = x + 2
  2. [Subtraction Property of Equality] Subtract <em>x</em> on both sides:                         x + 3 = 2
  3. [Subtraction Property of Equality] Subtract 3 on both sides:                        x = -1

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

  1. Substitute in <em>x</em> [Original Equation]:                                                                  y = -1 + 2
  2. Add:                                                                                                                    y = 1
3 0
3 years ago
Read 2 more answers
Math problem help me. I got it wrong I think
lukranit [14]

Answer:

The answer is B

Step-by-step explanation: After solving this equation using y=mx+b

I got y=-4x+7

So they give us the slope which is negative 4

so you would throw in the x coordinate with the slope and multiply to get y=-12+7

then you would use the y coordinate to substitute the Y

-5=-12+7

i add twelve on both sides and end up with the y intercept being 7]

so I add them into the equation and got y=-4x+7

8 0
2 years ago
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