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11111nata11111 [884]
3 years ago
7

Please help me ASAP!!!

Mathematics
1 answer:
Anna71 [15]3 years ago
4 0

by triangle angle addition law

a + b + c = 180

3x +1 + 2x-1 +40 = 180

5x +40 = 180

5x = 180 - 40 = 140

x = 140/5 = 28

so

b = 2x -1 = 2×28-1= 56-1 = 55

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vaieri [72.5K]

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3 years ago
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Ilya [14]

Answer:

-1.32-34.7= -36.02

Step-by-step explanation:

A negative minus a negative will always give you another negative.

So, to do this quickly just see this equation "-1.32-34.7" as this equation "1.32+34.7" and add a negative once you've finished.

1.32+34.7= 36.02

Now add the negative.

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3 years ago
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Answer:

28

Step-by-step explanation:

I'm not sure if this is right

She rode 7 miles in 2 hours, so because she is going at the same speed you times/multiply 7 x 4 in order to determine the miles. I timed it by 4 because 2 hours times 4 = 8 hours.

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8 0
3 years ago
A 2.25 units<br> C 5 units<br> B 4 units<br> 0 16 units
S_A_V [24]

Answer:

B

Step-by-step explanation:

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