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beks73 [17]
3 years ago
12

How can you change the dimensions of the rectangle so that the ratio of the length to the width stays the same, but the perimete

r is 185 cm? Length is 25 cm and width is 12 cm
Mathematics
1 answer:
Lady bird [3.3K]3 years ago
8 0

Answer:

L = 62.5cm; B = 30cm

Step-by-step explanation:

P = 2 (L+W): L=25cm; W=12cm

=2 (25+12)

=50+24

P = 74cm

For a congruent rectangle with P = 185cm

A: 74 = 2 (25 + 12)

B: 185 = 2( ? + ?)

Since A/B are congruent;

185/75 = 2.5

B = 2 (2.5* (25 + 12)

= 2 ( 62.5 + 30)

= 125 + 60

= 185

Hence, B: L = 62.5cm; B = 30cm

185cm = 2 (62.5 + 30)

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Answer:

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Step-by-step explanation:

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8 0
3 years ago
2x - 3y = 9; 2x + y = 13
olga2289 [7]

Answer:

See explanations below

Step-by-step explanation:

Given the simultaneous equations;

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From 2;

y = 13-2x

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2x - 3(13-2x) = 9

2x -39 + 6x = 9

8x - 39 = 9

8x = 9+39

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x = 6

Since y  = 13-2x

y = 13-2(6)

y = 13-12

y = 1

The soluton to the system of equation is (6, 1)

Given the equations;

99x + 101y = 499; .... 1 * 101

101x + 99 y = 501 ... 2 * 99

______________

9999x + 10,201y = 50,399

9999x + 9801y = 49,599

Subtract

10201y - 9801y = 50399-49599

400y = 800

y = 2

Substitute y = 2 into 1;

From 1;

99x + 101y = 499

99x + 101(2) =499

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x =2

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For the equations;

49x - 57y = 172 .... * 57

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____________________

2793x -3249y =  9804

2793x - 2401y = 12348

Subtract

-3249y+2401y = 9804-12348

-848y = -2544

y = 3

Substitute into 1;

49x - 57y = 172

49x - 57(3) = 172

49x - 171 = 172

49x = 171+172

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x = 7

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8 0
2 years ago
Below are the solutions for a variable "x." State the solution that matches the graph below.
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</span>x \in [-3,8]<span>


</span>
7 0
3 years ago
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Elanso [62]

Answer:

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Answer:

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Step-by-step explanation:

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