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BigorU [14]
4 years ago
6

Will mark brainliest and give 20 points!

Mathematics
1 answer:
Anna71 [15]4 years ago
4 0
Im not sure if you need the work, but the answer is 3.8 hours. you make them into fractions, like in one hour ann could build 1/5 of the model car and sam 1/15 of the car. you use that to then find 1/x (how much they could build together) and multiply by the lcd. Its complicated sorry i cant explain well lol

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Lelechka [254]
1. sqrt 52 = 7.211 rounds to 7

2. irrational number

3. sqrt 441 = 21....rational

4. 12^2 + 3^2 = h^2
    144 + 9 = h^2
     153 = h^2
      sqrt 153 = h
      12.4 = h <===

5. 6^2 + b^2 = 18^2
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    b^2 = 324 - 36
    b^2 = 288
    b = sqrt 288
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6. 39^2 + 52^2 = c^2
    1521 + 2704 = c^2
    4225 = c^2
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7. 4^2 + b^2 = 16^2
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     b = sqrt 240
     b = 15.49 rounds to 15.5 <==

8. ?
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4 years ago
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Step-by-step explanation:

i dont know this i will try oh i think it is c i think though

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