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Masja [62]
3 years ago
5

A composition of refiections over parallel lhes is the same as a

Mathematics
1 answer:
MA_775_DIABLO [31]3 years ago
7 0
The answer is A Translations
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Please help! My teacher didn't go over this in the notes D:, as long as it gets answered before midnight im fine though
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Answer:

15*9=135

Step-by-step explanation:

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1. The prism-shaped roof has equilateral triangular bases. Create an equation that models the height of one of the roof's triang
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1. Check picture 1. Let the one side of the triangle be a, drop one perpendicular, CD. Then triangle ADB is a right triangle, with hypothenuse a and one side equal to 1/2a. By the Pythegorean theorem, as shown in the picture, the height is \frac{ \sqrt{3} }{2} a

2. if a a=25 ft, then the height is \frac{ \sqrt{3} }{2} a=\frac{ \sqrt{3} }{2} *25= \frac{1.732}{2}*25= 21. 7 (ft)

3. consider picture 2. Let the length of the roof be l feet.

one side of the prism (the roof) is a rectangle with dimensions a and l, so the area of one side is a*l
the lateral Area of the roof is 3a*l

the area of the equilateral surfaces is 2*( \frac{1}{2} *a* \frac{ \sqrt{3} }{2}a )=\frac{ \sqrt{3} }{2} a^{2}

so the total area of the roof is \frac{ \sqrt{3} }{2} a^{2} +3al

4. The total area was the 2 triangular surfaces + the 3 equal lateral rectangular surfaces. Now instead of 3 lateral triangular surfaces, we have 2.
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6. now a=25 and l=2a=50

Area=\frac{ \sqrt{3} }{2} a^{2} +2al=\frac{ \sqrt{3} }{2} * 25^{2}+2*25*50=25 ^{2}  (\frac{ \sqrt{3} }{2} +4)=625*4.866

=3041.3 (ft squared)

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4 years ago
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Tess and Alice are both on the swim team. Last practice, they each swam laps for the same amount of time, but Tess finished more
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wait so what is the numbers of distance they have swam?

Step-by-step explanation:

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1/40 would be your answer because 0.025 is would be 25/1000. Simplify that then you would get 1/40.
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Please help me graph #9.
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Hint to start out the problem:

eg. For f(4), use the first expression, (x-3)^2 because 4 is greater than 1.
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