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jarptica [38.1K]
3 years ago
7

F(x)=x^2 - 4x; find f (5)

Mathematics
1 answer:
kobusy [5.1K]3 years ago
5 0

Answer:

f(5) = 5

Step-by-step explanation:

F(x)=x^2 - 4x

Let x = 5

F(5)=5^2 - 4*5

    = 25 - 20

    = 5

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Line MN passes through points M4, 3) and M7, 12). If the equation of the line is written in slope-intercept form, y-mx+ b, what
Butoxors [25]

Answer:

<h2>b = -9</h2>

Step-by-step explanation:

The slope-intercept form of an equation of a line:

y=mx+b

m - slope

b - y-intercept

The formula of a slope:

m=\dfrac{y_2-y_1}{x_2-x_1}

We have the points M(4, 3) and N(7, 12). Substitute:

m=\dfrac{12-3}{7-4}=\dfrac{9}{3}=3

Therefore we have the equation:

y=3x+b

Put the coordinates of the point M to the equation:

3=3(4)+b

3=12+b            <em>subtract 12 from both sides</em>

-9=b

4 0
3 years ago
Multiply to get 3, add to get 8
Phantasy [73]
If you are doing a quadratic, you wil have to do quadratic formula, if you are just doing that, no solution.
8 0
3 years ago
<img src="https://tex.z-dn.net/?f=-8%5E%5Cfrac%7B1%7D%7B3%7D" id="TexFormula1" title="-8^\frac{1}{3}" alt="-8^\frac{1}{3}" align
Charra [1.4K]

9514 1404 393

Answer:

  -2

Step-by-step explanation:

  -8^(1/3) = -(2^3)^(1/3) = -(2^(3/3)) = -2

6 0
3 years ago
Mike got a 45% discount when he bought a new jacket. Which of the following is NOT equivalent to 45%?
MariettaO [177]

Answer:

4/5 is NOT equivalent to 45%

Step-by-step explanation:

4/5 = 80%

4 0
3 years ago
To the nearest tenth, what is the perimeter of the triangle with vertices at (−2, 3), (3, 6), and (2, −2)?
katovenus [111]

9514 1404 393

Answer:

  20.3

Step-by-step explanation:

The distance formula can be used to find the side lengths.

  d = √((x2 -x1)^2 +(y2 -y1)^2)

For the first two points, ...

  d = √((3 -(-2))^2 +(6 -3)^2) = √(5^2 +3^2) = √34 ≈ 5.83

For the next two points, ...

  d = √((2 -3)^2 +(-2-6)^2) = √(1 +64) = √65 ≈ 8.06

For the last and first points, ...

  d = √((-2-2)^2 +(3-(-2)^2) = √(16 +25) = √41 ≈ 6.40

Then the sum of the side lengths is ...

  5.83 +8.06 +6.40 = 20.29 ≈ 20.3

The perimeter of the triangle is about 20.3 units.

7 0
3 years ago
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