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olga nikolaevna [1]
3 years ago
12

( 2 + 3 ) + ( 4 + x )

Mathematics
1 answer:
zzz [600]3 years ago
3 0
2+3=5 4+x=4x 5+4x=9x
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A rectangular prism must have a base with an area of no more than 27 square meters. The width of the base must be 9 meters less
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Answer:

The maximum height of the prism is 12\ m

Step-by-step explanation:

Let

x------> the height of the prism

we know that

the area of the rectangular base of the prism is equal to

A=L*W

A\leq 27\ m^{2}

so

L*W\leq 27 -------> inequality A

W=x-9 ------> equation B

L=W+6 -----> equation C

Substitute equation B in equation C

L=(x-9)+6

L=x-3 ------> equation D

Substitute equation B and equation D in the inequality A

(x-3)*(x-9)\leq 27-------> using a graphing tool to solve the inequality

The solution for x is the interval---------->[0,12]

see the attached figure

but remember that

The width of the base must be 9 meters less than the height of the prism

so

the solution for x is the interval ------> (9,12]

The maximum height of the prism is 12\ m

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