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Wittaler [7]
4 years ago
10

I need the answer and show work for this question

Mathematics
2 answers:
gavmur [86]4 years ago
6 0

Answer:

f(3) =-12

f(-1) =-12

Step-by-step explanation:

HELLO THERE

f(3)=-2(3)^2+8(3)

f(3)=-36+24

f(3)=-12

----------------------------

f(-1) =2(-1) ^2+8(-1)

f(-1) =-4-8

f(-1) =-12

//Both equal -12//

HAVE A GREAT DAY

snow_lady [41]4 years ago
4 0

Answer:

Step-by-step explanation:

f(x) = -2x² + 8x

f(3) = -2*(3)² +  8*3

     = - 2*9 + 24

     = - 18+ 24

f(3) = 6

f(1)= -2*(-1)² + 8*(-1)

   = -2*1  - 8

  = - 2 -8

f(1) = -10

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MrRa [10]

Answer:

\frac{x^2+19x-56}{4x^2-32x}

Step-by-step explanation:

To add two fractions we need a common denominator. Just by looking at the two, there are no common factors. This means the denominator would be the product of the two: 4x(x-8). In order to obtain this, we multiply the first fraction by (x-8)/(x-8) - 1, and the second by 4x/4x - 1:

\frac{x+7}{4x} *\frac{x-8}{x-8} +\frac{5}{x-8}*\frac{4x}{4x}

We can use the distributive property to simplify:

\frac{x^2-x-56}{4x(x-8)} +\frac{20x}{4x(x-8)}

The sum of the two is:

\frac{x^2+19x-56}{4x^2-32x}

7 0
3 years ago
If 20% of a number is 20<br>find that number​
torisob [31]

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1. Set a proportion.

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How do I make sure if it is correct?

100 x .2 = 20

8 0
4 years ago
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Someone please help me asap,
professor190 [17]

<em>Answer:</em>

Below is the complete proof.

<em />

<em>STATEMENT                              REASON  </em>

___________________________________________________

1. BC = EF                                    1. Given

2. AB + BC = AC                         2. Betweenness

3. AC > BC                                  3. Def. of segment inequality

4. AC > EF                                   4. Def. of congruent segments

Explanation:

  1. As BC = EF is given
  2. AB + BC = AC because it holds betweenness. Betweenness defines that if a point B is between points A and C, then the length of AB and the length of BC is equal to the length of AC.
  3. AC > BC because the Parts Theorem (Segments) mentions that if B is a point on AC between A and C, then AC > BC and AC>AB.
  4. AC > EF because BC = EF and if AC>BC, then it must be AC>EF.

<em>Keywords: segment, proof, statement</em>

<em> Learn more about proof, statement and reason from brainly.com/question/11775532</em>

<em> #learnwithBrainly</em>

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4 years ago
Question 5(Multiple Choice Worth 5 points)
andriy [413]

Answer:

A is the correct answer have a nice day

Step-by-step explanation:

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