marmar72
20.03.2020 •
Mathematics
A dog groomer could clean four dogs in an hour how many could they clean in 5/6 of an hour
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Ответ:
3,333...
Step-by-step explanation: U can do a rule of three
4 1
x 5/6
4 x 5/6 = 20/6
20/6 = 3,33...
Ответ:
4/5
Step-by-step explanation:
What a unique handwriting you have there. Anyways for this types of questions you just have to imagine a right-angled triangle and write down the values and an angle (2A).
First, to find height of the triangle, you can try using Pythagorean theorem, √(5²-3²) and you'll get the value 4.
Remember the formula,
sin a = opposite/hypothenuse.
Substitute the values in,
sin 2A = 4/5