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Kay [80]
3 years ago
8

What does a formal proof need to have?

Mathematics
2 answers:
wariber [46]3 years ago
6 0

Answer:

B. Justification for each step

Step-by-step explanation:

kirill [66]3 years ago
4 0

Answer:b

Step-by-step explanation:

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What are the x-intercepts of the quadratic function? y = x^2 – 3x + 2
Bingel [31]
The x intercepts are points where the graph cut the x axis. the x intercept are 2 and 1, when y is equal to zero. ( use factorization method) <span />
4 0
3 years ago
3/2-5/6-2/9<br><br> WILL GIVE BRAINLIEST THANKS AND 5 STARS FOR THE 1ST CORRECT ANSWER
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Answer:

4/9

Step-by-step explanation:

It’s basic math UwU

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Angle ACD is supplementary to angles ACE and BCD and congruent to angle BCE.
Andrew [12]

Answer:

Step-by-step explanation:

Angle BCE is supplementary to angle ACE.

Angle BCD is supplementary to angle BCE.

Angle BCD is congruent to angle ACE

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4 years ago
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Sarah is the president of the drama club and wants to publish a newspaper. Expenses are $.90 for printing and mailing each copy,
larisa86 [58]
Let: x = number of copies sold

We can formulate the following equation to solve for x:

1.50x - 0.9x - 600 = 0

x = 1000

Therefore, the club must sell 1000 copies to break even. Among the choices, the correct answer is A. 
5 0
3 years ago
Find soluton to x^2-14x+49=25
Artyom0805 [142]

\boxed{x=12 \ and \ x=2}

<h2>Explanation:</h2>

In this exercise, we have the following equation:

x^2-14x+49=25

We can write this Quadratic Equation in Standard Form as follows:

x^2-14x+49=25 \\ \\ Subtract \ 25 \ from \ both \ sides: \\ \\ x^2-14x+49-25=25-25 \\ \\ x^2-14x+24=0 \\ \\

So this is a Non-perfect Square Trinomial. To factor out this, let's choose two numbers such that:

  • The sum is -14
  • The product is 24

Those numbers are:

  • -12 and -2
  • SUM: -12-2 = -14
  • PRODUCT: (-12)(-2)=24

So we can write this as:

x^2 + (a + b)x + ab=(x + a)(x + b) \\ \\ a=-12 \\ b=-2 \\ \\  x^2-14x+24=(x-12)(x-2)=0 \\ \\ So \ the \ solutions \ are: \\ \\ \boxed{x=12 \ and \ x=2}

<h2>Learn more:</h2>

Quadratic Ffrmua: brainly.com/question/10188317

#LearnWithBrainly

6 0
3 years ago
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