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2 years ago

The graph below represents the solution set of which inequality? x2 – 2x – 8 0 x2 + 2x – 8 > 0

Mathematics

2 answers:

abruzzese [7]2 years ago

8 0

Answer: x^2+2x-8<0

Step-by-step explanation:

A. x^2 - 2x - 8 < 0

(x - 4)(x + 2) < 0

B. x^2 + 2x - 8 < 0

(x + 4)(x - 2) < 0

C. x^2 - 2x - 8 > 0

(x - 4)(x - 2) > 0

D. x^2 + 2x - 8 > 0

(x + 4)(x - 2) > 0

When you test a point in the interval between -4 and 2, for example 0, it is negative.

sineoko [7]2 years ago

5 0

Answer:

Step-by-step explanation:

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Please I need help ASAP The answer choices $1,300 . $1,500 . $3,300 . $4,300 . $4800/1 copier . -$500/1 year . V(x) =

Dafna11 [192]

1. The function that models this equation is:

Since the value V (x) of the copier depreciates over time, hence the 500 must be negative, therefore the equation:

V(x) = −500x + 4800

2. The rate of change for the function is:

The rate of change is also equivalent to the slope of the equation, in this case the slope is equal to:

-$500/1 year

3. The model predicts that the value of the copier after 3 years will be:

Substituting the value of x = 3 to the function gives us:

V(x) = −500 (3) + 4800

V(x) = $3,300

4. The model predicts that the value of the copier after 7 years will be:

Substituting the value of x = 7 to the function gives us:

V(x) = −500 (7) + 4800

V(x) = $1,300

3 0

2 years ago

Read 2 more answers

Which of the following functions shown in the table below is not an exponential function?

kramer

Answer:

B. f(x)

D. h(x)

Step-by-step explanation:

An exponential function will have a common ratio.

We check and see if the consecutive terms has a common ratio.

For f(x),

$\frac{5}{2} \ne \frac{10}{5}$

This is not an exponential sequence.

For g(x), we have:

$\frac{2}{1} = \frac{4}{2} = \frac{8}{4} = 2$

For h(x),

$\frac{1.25}{1} \ne \frac{1.5}{1.25}$

This is not an exponential sequence

For k(x),

$\frac{16}{64} = \frac{4}{16} = \frac{1}{4} = \frac{0.25}{1}$

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2 years ago

The formula for the area (A) of a circle is A = π • r2, where r is the radius of the circle. Ronisha wants to find the area of a

kobusy [5.1K]

<em>Greetings from Brasil...</em>

Here we will apply rule of 3...

This formula, A = πR², its for the whole circle, that is, 360° (2π)

We want the area of only a part, that is, a circular sector whose angle π/6

sector area

2π ----- πR²

π/6 ----- X

2πX = (π/6).πR²

2πX = π²R²/6

X = π²R²/12π

If Ronisha multiply the area by 1/12 she will get the area of sector with angle of π/6

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2 years ago

A waitress works 1.75 hours less in the afternoon than in the evening. If she works 5 1/8

gayaneshka [121]

Let $x$ be the number of hours that the waitress works in the evening.

We know for our problem that she works $5 \frac{1}{8}$ in the afternoon and that she works <span>1.75 hours less in the afternoon than in the evening, so:
</span> $x=5 \frac{1}{8} -1.75$
<span>Since </span> $\frac{1}{8} =0.125$ , we can rewrite our expression:
$x=5.125-1.75$
$x=3.375$

We can conclude that she works 3.375 hours in the evening, or expressed as a mixed fraction: $3 \frac{3}{8}$ hours.