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galina1969 [7]
2 years ago
10

The length of a rectangle is 2x + 6. Its width is 52. Find the value of ac if the perimeter is 138m².

Mathematics
1 answer:
Sergeeva-Olga [200]2 years ago
8 0

Answer:

ac = 18.5

Step-by-step explanation:

perimeter of a rectangle =  2(l+b)

= 138m^2= 2(2x + 6 ) + 52

= 4x + 12 + 52 = 138  

= 4x + 64 = 138

= 4x = 138 - 64

= 4x = 74

= x =  74/4

= x = 18.5

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valentinak56 [21]

Answer:

1. x = 21

2. m∡ABC =  51°

Step-by-step explanation:

First problem, solve for x

the sum of inside angles of a triangle is 180

also the supplementary angle for L = 180 - 100 is 80°

now you can add all angles

80 + 2x - 11 + 2x + 27 = 180

4x + 96 = 180

4x = 84

x = 21

Second problem, solve for m∡ABC

the sum of inside angles of a triangle is 180

also the supplementary angle for C = 180 - 148 is 32°

now you can add all angles

31 + 2x - 15 + x - 5 = 180

3x + 12 = 180

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x= 56,

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3 years ago
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3 years ago
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frosja888 [35]

Answer:

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To learn more about kinetic energy

visit-:brainly.com/question/12669551

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