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3 years ago

11

which answer describes the graph of the function f(x)=-2*3^√x? just incase this isn't clear the three is above the square root s

ign. and its 2 times the rest of the equation. :)

1 answer:

andrey2020 [161]3 years ago

8 0

The function has a domain that goes from [0,∞]

And a range that goes from [-∞,0]

(See attached graph)

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Can someone please help

andre [41]

Answer:

x ≥ 1 (how to graph is listed below)

Step-by-step explanation:

To find where we need to plot the line, we first need to solve the inequality for x:

-2x - 3 ≤ -5

(Add three to both sides)

-2x ≤ -2

(Divide both sides by -2, but we can't forget that whenever we multiple or divide by a negative number, the sign flips!)

x ≥ 1

To graph this on the number line, you would put a dot on the 1 and fill it in completely (you fill in the dot for a "___ and equal to" sign. ex. ≥, ≤)

Then you would make an arrow from the dot to the right on the number line (this is because x must be greater than or equal to 1, so it must be facing in that direction)

8 0

3 years ago

Find the value of k so that 48x-ky=11 and (k+2)x+16y=-19 are perpendicular lines.

Rufina [12.5K]

Answer: k = -1 +/- √769

<u>Step-by-step explanation:</u>

48x - ky = 11

<u>-48x </u> <u> -48x</u>

-ky = -48x + 11

$\frac{-ky}{-k} = \frac{-48x}{-k} + \frac{11}{-k}$

$y =\frac{48x}{k} - \frac{11}{k}$

Slope: $\frac{48}{k}$

*************************************************************************

(k + 2)x + 16y = -19

<u>- (k + 2)x </u> -<u>(k + 2)x </u>

16y = -(k + 2)x - 19

$\frac{16y}{16} = -\frac{(k + 2)x}{16} - \frac{19}{16}$

$y = -\frac{(k + 2)x}{16} - \frac{19}{16}$

Slope: $-\frac{(k + 2)}{16}$

**********************************************************************************

$\frac{48}{k}$ and $-\frac{(k + 2)}{16}$ are perpendicular so they have opposite signs and are reciprocals of each other. When multiplied by its reciprocal, their product equals -1.

$-\frac{(k + 2)}{16}$ * $\frac{k}{48}$ = -1

$\frac{(k + 2)k}{16(48)}$ = 1

Cross multiply, then solve for the variable.

(k + 2)(k) = 16(48)

k² + 2k - 768 = 0

Use quadratic formula to solve:

k = -1 +/- √769

5 0

3 years ago

You want to put $2,000 in a simple intrest account.It has a 2.5% annual interest rate.How long will it take you to earn $500 in

PSYCHO15rus [73]

The answer is C ten years. 2.5 percent of 2000 is 50 so take 50 and divide it by 500 which equals 10

3 0

3 years ago

Read 2 more answers

1. You roll a number cube numbered from 1 to 6.<br> P( a number divisible by 3).

GarryVolchara [31]

1/2

Step-by-step explanation:

there are two numbers 3 and 6 so 2/6 is 1/3

3 0

3 years ago

PLEASEE HELPP RNN!! The volume of a cylinder is 2247 cubic centimeters and its radius is 4 centimeters,

igor_vitrenko [27]

Answer:

Step-by-step explanation:

r and h are the radius and height

Volume = πr²h = πr²4 = 2247

r ≈ 13.4 cm

3 0

3 years ago