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3 years ago

The range of the function f(k) = k2 + 2k + 1 is {25, 64}. What is the function’s domain?

1 answer:

3 0

<span>The domain of the function can be obtained by pluging the values of the range into f(x), i.e domain = {k^2 + 2k + 1 = 25, k^2 + 2k + 1 = 64} = {k^2 + 2k - 24 = 0, k^2 + 2k - 63 = 0}. Solving the two quadratic equations, we have that the range is {-9, -6, 4, 7}.I hope that my answer is helpful! Let me know if you need something more :)</span>

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Simplify 5-2(×-3) and (m+5)(m+5)

Elanso [62]

Answer:

Step-by-step explanation:

5 - 2(x - 3) and (m+5)(m+5)

$5 - 2(x-3)\\5 - 2x + 6\\-2x + 11$

$(m+5)(m+5)\\m^2+5m+5m+25\\m^2+10m+25$

Hope this helps!

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2 years ago

Let x and y be a whole number greater than 0 with y>x witch has the greater value 3x or 3y

Lilit [14]

Answer: 3y has a greater value

Step-by-step explanation:

well if they are both whole numbers greater than zero

but ( y ) is greater than ( x ) than no matter what ( y ) is always going to be greater than (x)

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3 years ago

A box is to be constructed with a rectangular base and a height of h cm. the length, l, of the box is 10 cm, and the width, w, i

vivado [14]

There are several information's already given in the question. based on those information's, the answer can be easily determined.
Height of the box = h cm
Length of the box = 10 cm
Width of the box = 2h
Then
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= 10 * h * 2h cubic cm
= 20h^2 cm^3
I hope that the above procedure is clear enough for you to understand and it has actually come to your desired help.

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3 years ago

Solve -2a -5 > 3 Which graph shows the solutions?

gogolik [260]

Answer: a< -4 D

Step-by-step explanation:

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3 years ago

Alonzo takes 12 minutes to run 6 times around a 400-meter track. Assuming he runs at a constant speed, how long does he take to

snow_lady [41]

Answer:

5 minutes to run 1 kilometer

Step-by-step explanation:

Alonzo takes 12 minutes to run 6 times around a 400-meter track.

6 times around a 400 m track

400 * 6 = 2400 meters

It take 12 minutes to run 2400 meters

2400 meters = 2400/1000 = 2.4km

distance = 2.4 km and time = 12 minutes

Now we find our constant speed

$Distance = speed * time$

2.4 = speed * 12

divide by 12 on both sides

speed = 0.2

so speed is 0.2 km per minute

Now we find out time when distance = 1km

Distance = speed * time

1 = 0.2 * t

divide by 0.2 on both sides

5 = t

So it take 5 minutes to run 1 kilometer

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3 years ago