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wlad13 [49]
3 years ago
14

Can anyone help me??

Mathematics
1 answer:
DiKsa [7]3 years ago
4 0

I think it's the second one, 3 1/3

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A boat travels 345km in 4 hours (with a constant speed). How far can it travel in three hours (with the same speed)?
Colt1911 [192]

Answer:

258.75km

Step-by-step explanation:

345/4=86.25

Can travel 86.25km an hour

86.25*3=258.75

Therefore it can travel 258.75 in 3 hours

7 0
4 years ago
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AveGali [126]
X=-4 trust me this right
6 0
3 years ago
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Find intergral (e^xcos(3x)dx
ArbitrLikvidat [17]

Answer:

Hello,

Step-by-step explanation:

Here is an other method than classical:

I=\int {e^x*cos(3x)} \, dx =e^x*(k_1/cos(3x)+k_2*sin(3x) )\\\\Let's\ derivate:\\\\e^xcos(3x)=e^x(k1*cos(3x)+k_2*sin(3x))+e^x*(k_1*(-sin(3x))*3+k_2*cos(3x)*3)\\\\By\ identification:\\\\\left\{\begin{array}{ccc}k_1+3k_2&=&1\\-3k_1+k2&=&0\\\end{array}\right.\\\\\\\left\{\begin{array}{ccc}k_1&=&\dfrac{1}{10}\\k2&=&\dfrac{3}{10}\\\end{array}\right.\\\\\\\boxed{I=e^x(\dfrac{1}{10}*cos(3x)+\dfrac{3}{10}*sin(3x))}\\

8 0
1 year ago
Please answer the question........Thank you! :D
olga55 [171]

Answer:

57

Step-by-step explanation:

because all the angle of a triangle add up to 180

180-63-60=57

6 0
3 years ago
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A base with an exponent that is a fraction can be written as a radical.<br> -True<br> -False
Usimov [2.4K]

True!

For example: 16^\frac{1}{2} can also represented as \sqrt{16}, and the answer will still be 4.

7 0
3 years ago
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