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artcher [175]
3 years ago
14

Help I need help!!! please!!!

Mathematics
1 answer:
tensa zangetsu [6.8K]3 years ago
4 0

a.(x - 4)(x - 9) = x {}^{2}  - 9x - 4x - 36 = x {}^{2}  - 3x - 36

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Mai wants to make an open top box by cutting out corners of a square piece of cardboard and folding up the sides. The cardboard
Bumek [7]

Answer:

V(x)=(4x^{3}-40x^{2}+100x)\ cm^3

The domain for x is all real numbers greater than zero and less than 5 com

Step-by-step explanation:

<em><u>The question is</u></em>

What is the volume of the open top box as a function of the side length x in cm of the square cutouts?

see the attached figure to better understand the problem

Let

x -----> the side length in cm of the square cutouts

we know that

The volume of the open top box is

V=LWH

we have

L=(10-2x)\ cm

W=(10-2x)\ cm

H=x)\ cm

substitute

V(x)=(10-2x)(10-2x)x\\\\V(x)=(100-40x+4x^{2})x\\\\V(x)=(4x^{3}-40x^{2}+100x)\ cm^3

Find the domain for x

we know that

(10-2x) > 0\\10> 2x\\ 5 > x\\x < 5\ cm

so

The domain is the interval (0,5)

The domain is all real numbers greater than zero and less than 5 cm

therefore

The volume of the open top box as a function of the side length x in cm of the square cutouts is

V(x)=(4x^{3}-40x^{2}+100x)\ cm^3

5 0
3 years ago
Lea walked 1/2 mile in 1/3 hour. How long will it take lea to walk 2 1/4 miles ?
cluponka [151]

takes her 20 minutes to walk 1/2 a mile  

2 miles=80 minutes  

1/4= 10 minutes i think  

so 80+10=1 1/2

{This is not my work!!!}

5 0
3 years ago
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Algebra Nation Algebra 2 section 13 topic 4
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What is the question please?
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What is the value of 4.5 x 10^5 written in standard form?
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Answer:

4500000

Step-by-step explanation: Let me know if this helped

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3 years ago
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