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3 years ago

Rectangle ABCD is similar to rectangle A′B′C′D′ , and the scale factor from rectangle ABCD to rectangle A′B′C′D′ is 4.

1 answer:

8 0

When you calculate area, the area is in square units

So if the 2nd rectangles is enlarged by a scale factor of 4, the area would be enlarged by a factor of 4^2.

4^2 = 4*4 = 16

The answer is 16

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Four more than 9 times a number is -77 what is the number

fredd [130]

Let n = number

9n + 4 = - 77
9n = - 81
n = - 9

Your number is - 9.

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4 years ago

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Which of the following could be the areas of the three squares below?

Flauer [41]

Answer:

A. 12 ft², 16 ft², and 20 ft²

Step-by-step explanation:

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3 years ago

If x = 4 units, y = 5 units, and h = 4 units, find the area of the rhombus shown above using decomposition.

QveST [7]

A. 36 square units
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3 years ago

Fred, Norman, and Dave own a total of 128 comic books. If Dave owns 44 of them, what is the average

iren [92.7K]

Answer:

$Mean = 42$

Step-by-step explanation:

Given

Represent Fred with F; Norman with N and Dave with D.

$Total = 128$

$D = 44$

Required

Determine the arithmetic mean of F and N

First, we have that:

$F + N + D = 128$

Substitute 44 for D

$F + N + 44 = 128$

Subtract 44 from both sides

$F + N + 44 - 44 = 128 - 44$

$F + N = 84$

Arithmetic mean of F and N is calculated as follows:

$Mean = \frac{F + N}{2}$

$Mean = \frac{84}{2}$

$Mean = 42$

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3 years ago

What is the length of Line segment A C? 3 ft 4 ft 9 ft 18 ft

AfilCa [17]

Answer:

By the given diagram,

AM = MB and CN = NB

M and N are the mid points of the sides AB and CB respectively,

Thus, by the mid point theorem,

MN ║ AC,

By the alternative interior angle theorem,

∠BMN ≅ ∠BAC

∠BNM ≅ ∠BCA

Thus, by AA similarity postulate,

ΔBMN ≅ ΔBAC

By the property of similar triangles,

Thus, The length of AC is 18 ft.

Step-by-step explanation:

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3 years ago

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