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mina [271]
3 years ago
14

Drew replaces the light bulb in the hall closet every 9 months and replaces the air filter every 6 months. He just replaced both

items this month after how many months while he replace both the light and the air filter?
Mathematics
2 answers:
lawyer [7]3 years ago
5 0
I think is 54.



9. 9.
natita [175]3 years ago
4 0
The 18th month he will have to change both, 
     I hope this helped!
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What theorem or postulate can be used to justify that two triangles are congruent
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Given the function h(x)= 5x-8, find the value of r such that h(3-r) = 6r
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Line g has a slope of -4/7. Which of the following equations represents a line that is perpendicular to line g?
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anizi versin
5 0
3 years ago
Determine if the two triangles are congruent. If they are, state how you know
Alborosie
<h3>Answers:</h3>
  1. Congruent by SSS
  2. Congruent by SAS
  3. Not congruent (or not enough info to know either way)
  4. Congruent by SAS
  5. Congruent by SSS
  6. Not congruent (or not enough info to know either way)
  7. Congruent by SAS
  8. Congruent by SAS

==================================

Explanations:

  1. We have 3 pairs of congruent sides. The tickmarks tell us how the congruent sides pair up (eg: the double tickmarked sides are the same length). So that lets us use SSS. The shared overlapping side forms the third pair of congruent sides.
  2. We have two pairs of congruent sides (the tickmarked sides and the overlapping sides), and an angle between the sides mentioned. Therefore, we can use SAS to prove the triangles congruent.
  3. We don't have enough info here. So the triangles might be congruent, or they might not be. The convention is to go with "not congruent" until we have enough evidence to prove otherwise.
  4. We can use SAS like with problem 2. Vertical angles are always congruent.
  5. This is similar to problem 1, so we can use SSS here.
  6. There isn't enough info, so it's pretty much a repeat of problem 3
  7. Same idea as problem 4.
  8. Similar to problem 2. We have two pairs of congruent sides and an included angle between them allowing us to use SAS

The abbreviations used were:

  • SSS = side side side
  • SAS = side angle side

The order is important with SAS because the angle needs to be between the sides mentioned.

5 0
2 years ago
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