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Mrac [35]
3 years ago
7

For which intervals is the function positive? (4,8] (-6,-2) (-2,4) [-8,-6)

Mathematics
2 answers:
Alexxandr [17]3 years ago
5 0

Answer:

(-2,4)

Step-by-step explanation:

A positive function means that the slope or rather the gradient of the graph at that point is positive.

The negative gradient always slides from right to left. i.e the intervals for which the function is negative are; between x = -8 and x = -4 and between x = 0 and x = 8.

The function is positive when the slope slides from left to right. From the graph that it is between x = -4 and x = 0.

From the choices the function is positive at,  (-2,4)

pav-90 [236]3 years ago
3 0

it would be the intervals in which the Y value is greater than O, so both (-2,4);[-8,-6) would be the answer

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quadrilateral ABCD is dilated by a scale factor of 2 centered around (2,2). Which statement is true about the dilation?
Setler [38]

Answer:

The vertices of the image will have the coordinates

A(-5, 1) → A'(2x-2, 2y-2) → A'(-12, 0)

B(-4, 3) → B'(2x-2, 2y-2) → B'(-10, 4)

C(1, 2) → C'(2x-2, 2y-2) → C'(0, 2)

D(-3, 0) → D'(2x-2, 2y-2) → D'(-8, -2)

Step-by-step explanation:

<em>Note: You missed to mention the vertices of a quadrilateral ABCD. So, I am assuming the following vertices. It would anyways clear your concept.</em>

<em />

Let us suppose

  • A(-5, 1)
  • B(-4, 3)
  • C(1, 2)
  • D(-3, 0)

We know that the rule of the dilation with the center of dilation at (2,2) by a scale factor of 2 is:

  • (x, y) → (2x-2, 2y-2)

Therefore, the vertices of the image will have the coordinates

A(-5, 1) → A'(2x-2, 2y-2) → A'(-12, 0)

B(-4, 3) → B'(2x-2, 2y-2) → B'(-10, 4)

C(1, 2) → C'(2x-2, 2y-2) → C'(0, 2)

D(-3, 0) → D'(2x-2, 2y-2) → D'(-8, -2)

6 0
2 years ago
A screen has side lengths of 10 ft and
Strike441 [17]

The length from one  corner to the opposite corner is 26 feet

The screen is the shape of a rectangle.

The length from one corner to the opposite corner is known as the diagonal or hypotenuse. The diagonal separates the rectangle into 2 right-angled triangles . The diagonal's value can be determined using Pythagoras theorem

The Pythagoras theorem: a² + b² = c²

where a = length

b = width

c = diagonal

10² + 24²

100 + 576

= 676

determine the value of the square root

√576 = 26 feet

To learn more about Pythagoras theorem, please check: brainly.com/question/20936855?referrer=searchResults

3 0
2 years ago
Last month, the daily balance in Joana's credit card account was $1,000 for 9 days, $750 for 10 days, $850 for 4 days, and $900
FrozenT [24]

Answer:

<em />Average = \$873<em />

<em />

Step-by-step explanation:

Given

$1000 for 9 days

$750 for 10 days

$850 for 4 days

$900 for other days

Required

Compute the daily average

First, we need to compute the number of days her balance is $900

Assuming the billing cycle is 30 days;

Number\ of\ days = 30 - (9 + 10 + 4)

Number\ of\ days = 30 - 23

Number\ of\ days = 7

The Average is then calculates using:

Average = \frac{\sum fx}{x}

Average = \frac{1000 * 9 + 750 * 10 + 850 * 4 + 900 * 7}{9 + 10 + 4+ 7}

Average = \frac{26200}{30}

Average = 873.333333333

<em />Average = \$873<em> --- Approximated</em>

3 0
3 years ago
Will mark brainliest for correct answer, due soon!
Rus_ich [418]

circumference = pi*d

70cm*pi = 219.8cm

219.8cm × 240 rev = 52752 cm

52752cm/100 = 528m

4 0
3 years ago
When the chef turned the new freezer on, the temperature on the internal thermometer was 2 °C.
motikmotik

Answer: -13 °C.

Step-by-step explanation:

7 0
2 years ago
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