3 years ago

What is the geometric mean of 7 and 12? a. 1 5/7 b. 9.5 c. 2 21 d. 4 21

Mathematics

2 answers:

iris [78.8K]3 years ago

6 0

Alright, do you know what mean is?

galina1969 [7]3 years ago

6 0

C ................................

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NNADVOKAT [17]

17/2 = 8.5 hours per week

8.5 x 5 = 42.5 hours in 5 weeks

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3 years ago

The diameter of a circle is ___________the length of its radius?

serg [7]

Answer:

Twice the length of the radius

Step-by-step explanation:

A radius by definition is half of the diameter which means the diameter is twice the radius.

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3 years ago

A rug is to be centered in a room so that the border around it is of a consistent width on all four sides. If the room is 10 ft

aleksley [76]

Answer:

The width of the border can be 9 feet or 3.5 feet.

Step-by-step explanation:

Let the width be x

Length of room = 10 feet

Breadth of room = 15 feet

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Breadth of rug = 15-2x

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We are given that the area of the rug is 24 square feet.

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$2(x-9)(2x-7)=0$

$x=9,\frac{7}{2}$

$x=9,3.5$

Substitute x =9 in A

$(10-2(9))(15-2(9))=24$

$24=24$

LHS = RHS

Substitute x = 3.5

$(10-2(3.5))(15-2(3.5))=24$

$24=24$

LHS = RHS

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Step-by-step explanation:

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Step-by-step explanation:

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