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Basile [38]
3 years ago
5

I need these done right

Mathematics
1 answer:
Aleks04 [339]3 years ago
7 0

Answer:

13. 20 + (-15) = 5 -- in total he kept 5 pounds

14. -28 + 38 = 10 -- the temperature changed by 10º over 12 hours

15. 100 + (-72) + 48 = 76

Step-by-step explanation:

13. since he gained 20lbs, then lost 15, add -15 to 20 to get 5, the amount of pounds he kept on him

14. the temperature starts at -28º then goes up 38º, so add 38 to -28.

15. the ramp goes up 100, (+100) then down 72, (-72) and then up another 48 (+48) as equation this would be 100 + (-72) + 48

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Answer:

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3 years ago
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yaroslaw [1]

Answer:

See Below.

Step-by-step explanation:

We are given that ∠1 and ∠7 are supplementary.

And we would like to prove that a is parallel to b.

  Statements:                                           Reasons:

\textbf{\textsf{1. $\angle 1$ and $\angle 7$ are supplementary}}              Given

\textsf{2. $m\angle3$ + $m\angle 7$ $= 180$}                               Supplementary Angles

\textsf{3. $\angle3$ and $\angle7$ are supplementary}                Definition of Supplementary

\textsf{4. }\bf{\angle 1 \cong \angle3}                                               Congruent Supplements Theorem

\textsf{5. }a\parallel b                                                      Corresponding Angles Converse

And we are done!

 

3 0
3 years ago
Read 2 more answers
Supplementary angles always add up to 180 degrees. TRUE OR FALSE
erica [24]

Answer:

yes this is true.

Supplementary angles always add up to 180°.

3 0
3 years ago
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Zinaida [17]

Answer: 43.988

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