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Ivan
3 years ago
10

Guys please help me man. Please

Mathematics
1 answer:
OLEGan [10]3 years ago
3 0

Answer:

7.4

Step-by-step explanation:

I did this before that's how I know

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Find the vertex of the graph of f(x)=-4(x-1)(x+5)
madreJ [45]

The vertex of the graph is (h, k) = (- 2, 36).

<h3>How to find analytically the vertex of a quadratic equation</h3>

In this question we have a quadratic equation of the form f(x) = a · (x - r₁) · (x - r₂) and we need to transform the expression into its vertex form of determine the coordinates of the vertex. First, we need to exprand the expression:

f(x) = - 4  · (x - 1) · (x + 5)

f(x) = - 4 · (x² + 4 · x - 5)

f(x) = - 4 · x² - 16 · x + 20

Now we proceed to complete the square:

f(x) = - (4 · x² + 16 · x - 20)

- f(x) = 4 · x² + 16 · x - 20

- f(x) = (2 · x)² + 8 · (2 · x) - 20

- f(x) + 36 = (2 · x)² + 8 · (2 · x) + 16

- f(x) + 36 = (2 · x + 4)²

- f(x) + 36 = 4 · (x + 2)²

f(x) - 36 = - 4 · (x + 2)²

The vertex of the graph is (h, k) = (- 2, 36).

To learn more on quadratic equations: brainly.com/question/17177510

#SPJ1

7 0
1 year ago
What is the area of the figure?
Bad White [126]
20m ^2

Explanation:
The top part be be cut into 2 2•2 triangles. A = 4 for both of them
And the rest is a 4•4 square, so A = 16.
4 + 16 = 20

Hope this helps!
5 0
3 years ago
Given the equation. solve for x and identity if it is an extraneous solution.
Usimov [2.4K]

Answer:

Step-by-step explanation:

A

3 0
3 years ago
Read 2 more answers
Weir and Max put $75 in quarters and dimes in the box. There were 400 more dimes than quarters. How many coins of each type were
anyanavicka [17]

Answer:

100 quarters = 2500 cents = $25

500 dimes = 5000 cents = $50

total = $75

Step-by-step explanation:

3 0
2 years ago
Solve the following equation for the variable given.
Korvikt [17]

9514 1404 393

Answer:

  b = -2ax

Step-by-step explanation:

Multiply both sides of the equation by -2a.

  x = -b/(2a)

  (-2a)x = b(-2a)/(-2a) = b

  b = -2ax

4 0
3 years ago
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