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anzhelika [568]
1 year ago
7

A private grassland has an area of 2/5km squared. The owner of the garden buys an extra of 1/3km squared of land from the neighb

our to make his grassland bigger. What is the new size of the grassland?
Mathematics
1 answer:
dezoksy [38]1 year ago
6 0

Answer:

11/15 km

Step-by-step explanation:

Simply sum the areas:

2/5 + 1/3 = (6 + 5)/15 = 11/15

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Sin α = 21/29, α lies in quadrant II, and cos β = 15/17, β lies in quadrant I Find sin (α - β).
Sever21 [200]
\sin(\alpha-\beta)=\sin\alpha\cos\beta-\cos\alpha\sin\beta

\sin\alpha=\dfrac{21}{29}\implies \cos^2\alpha=1-\sin^2\alpha=\dfrac{400}{841}

Since \alpha lies in quadrant II, we have \cos\alpha, so

\cos\alpha=-\sqrt{\dfrac{400}{841}}=-\dfrac{20}{29}

\cos\beta=\dfrac{15}{17}\implies\sin^2\beta=1-\cos^2\beta=\dfrac{64}{289}

\beta lies in quadrant I, so \sin\beta>0 and

\sin\beta=\sqrt{\dfrac{64}{289}}=\dfrac8{17}

So

\sin(\alpha-\beta)=\dfrac{21}{29}\dfrac{15}{17}-\left(-\dfrac{20}{29}\right)\dfrac8{17}=\dfrac{475}{493}
8 0
3 years ago
PLEASE HELP NEED ASAP!
Scrat [10]

Answer:

what grade is this

Step-by-step explanation:

4 0
3 years ago
Help please? I can choose more than one answer I just don’t understand this stuff
Gwar [14]

...hay.... \\  a + 8 =    -  \frac{5}{a}  \\ a +  \frac{5}{a}  =  - 8 \\  {a }^{2}  + 5 =  - 8a \\  {a }^{2}  + 8a =  - 5 \\ henca \:  \: opion \: no.1 \: is \: correct
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4 years ago
Help please !! Anything would be greatly appreciated thank you
kirill115 [55]

Boleh translate in Malay?

6 0
3 years ago
Can you guys check my work pls?
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Hey number 8. Be super careful, less than always look at that it should be 5n-3
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