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IrinaK [193]
3 years ago
5

It's my last question just nee help because I'm dumb​

Mathematics
2 answers:
lesya692 [45]3 years ago
7 0

Answer:

c.171

Step-by-step explanation:

add the ones in the parentheses first and square it. we get 7^2=49. ow, multiply by 4 as multiplication comes next. we get 196. square 5. 5^2=25. 196-25=171.

inna [77]3 years ago
3 0
Answer: C

4x7*2-25

4x49-25

196-25

= 171

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Answer:

1. B) 5.7

2. A) 12

3. A) 11.4

4. A) 5.7

5. A) 16.2

6. A) 11.2

7. No, they do not form a right triangle

8. Yes, they do form a right triangle

Step-by-step explanation:

Extra tip: The hypotenuse has to be less than both sides added together, but cannot be more than either of the sides alone.

1.

16² + b² = 17²

256 + b² = 289

256 - 256 + b² = 289 - 256

b² = 33

√b² = √33

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2.

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256 - 256 + b² = 400 - 256

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3.

7² + 9² = c²

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130 = c²

√130 = √c²

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4.

7² + b² = 9²

49 + b² = 81

49 - 49 + b² = 81 - 49

b² = 32

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5.

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6.

10² + b² = 15²

100 + b² = 225

100 - 100 + b² = 225 - 100

b² = 125

√b² = √125

b = 11.18 or 11.2

7.

15² + 8² = 16²

225 + 64 = 256

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8.

5² + 12² = 13²

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Answer:

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