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Zinaida [17]
3 years ago
8

Please help

Mathematics
1 answer:
Ipatiy [6.2K]3 years ago
4 0

Answer:

cos (theta) = √21/5

Step-by-step explanation:

sin (theta) = 2/5

(sin (theta))^2 = 4/25

4/25 + (cos (theta))^2 = 1

(cos (theta))^2 = 1 - 4/25 = 21/25

cos (theta) = √21/5

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kelly is using a bucket to fill up a barrel with water from a well. The barrel holds 25.5 liters.the bucket holds 800 millileter
MatroZZZ [7]
To determine how much of the barrel is left to fill, you must subtract the amount of water already in it from the total mass of the bucket. 

25.5 - 5.2 = 20.3 Litres  

In order to the fill the entire barrel, Kelly must collect 20.3 Litres of water. You must then covert the measurement from litres to millilitres so that the bucket and barrel are measured in the same units. 

20.3L = 20300mL

You must then divide the amount of space left by the mass of the bucket. This will determine the least number of buckets needed to fill the barrel. 

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6 0
4 years ago
What is the distance between 16 and 52
aev [14]
Well thats easy u just switch the number to 52 subtract 16 and u would get 36 and to check if the answer is right u would just add 36 plus 16 and it would be 52 so the answer would be the distance is 36 

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7 0
3 years ago
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Which expression is equivalent to 12^-6 x 12^-1?
castortr0y [4]
2.79 x 10 ^ -8
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8 0
3 years ago
Which notation shows that P is the function of x?
Umnica [9.8K]
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3 0
3 years ago
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The sum of two numbers is 58. Twice the second number subtracted to four times the first number is 28. Find the two numbers. ​
lakkis [162]

Answer: The numbers are 14 2/3 and 43 1/3 (you can also write it as 44/3 and 130/3)

Step-by-step explanation:

x+y=58

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When you plug x in, you get y=43 1/3

5 0
2 years ago
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