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Alika [10]
3 years ago
7

Twice the difference of a number and 9 is 5 Use the variable c for the unknown number.

Mathematics
1 answer:
Leya [2.2K]3 years ago
6 0

Answer:

C = 11.5

Step-by-step explanation:

1. (c - 9) 2 = 5

2. 2c - 18 = 5

3. 2c = 23

4. c = 11.5

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Please help me with this!!!
Dafna1 [17]

Answer:

option C is correct answer ..

Step-by-step explanation:

angle A + angle B + angle C = 180° ( by angle sum property of triangle )

3x + 4x-19+ 3x -1 = 180

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10x = 180 +20 = 200

x = 200/10 = 20 °

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angle B = 4× 20 - 1 9 = 61 °

angle C = 3× 20 -1 = 59 °

angle B is greatest so side opposite to it will be greatest in length ....so length of AC is greatest ....

so option C is the correct answer of this question ...

plz mark my answer as brainlist plzzzz vote me also as I have done this question by taking a lot of time Hope it will be helpful for you ....

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3 years ago
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Step-by-step explanation:

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Step-by-step explanation:

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