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Nadya [2.5K]
2 years ago
11

Pls help due at 2:00

Mathematics
2 answers:
expeople1 [14]2 years ago
8 0
The answer is 35.09 hope I helped ;)
slamgirl [31]2 years ago
4 0

Answer:

1. $8.77

2. 498.456

Step-by-step explanation:

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A boy walked for 4 hours and cycled for 3 hours covering a distance of 87.6km . Later she walked for 2 hours and cycled for 4 ho
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average speed for cycling = 23.2 km/h

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3 years ago
What is the derivative of y=tan(arcsin(x))?
Anuta_ua [19.1K]
Hello,

(tg(x))'=1/cos²(x)

(arcsin(x))'=1/√(1-x²)

cos²(arcsin(x))=1-sin²(arcsin(x))=1-x²


(tg(arcsin(x)))'= \dfrac{1}{cos(arcsin(x)))^2} * \dfrac{1}{\sqrt{1-x^2}} \\

=\dfrac{1}{1-sin(arcsin(x))^2}* \dfrac{1}{\sqrt{1-x^2}} \\

= \dfrac{1}{1-x^2} * \dfrac{1}{\sqrt{1-x^2}} \\

\boxed{= \dfrac{\sqrt{1-x^2}}{x^4-2x^2+1}}\\


4 0
3 years ago
What is the value of -d when d=-2 ?<br><br> A. 4<br> B. -4<br> C. -2<br> D. 2
Darya [45]

it would be A or D for the math of d=-2

6 0
3 years ago
Read 2 more answers
200 miles divided by 8​
yulyashka [42]

Answer:

25

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Step-by-step explanation:

6 0
3 years ago
Tony and Maria are two star-crossed lovers trying to get on a committee of 4 people. If there are 9 people eligible for this com
ASHA 777 [7]

Answer:

The number of ways Tony and Maria can both be selected for the committee is 8 ways.

Step-by-step explanation:

i) Tony and Maria have to be on the committee together or not at all.

ii) Let us consider Tony and Maria as combined as one person.

 Therefore now we can say that the number of eligible people for the committee = 9 - 1 = 8.

iii) therefore the number of ways that both Tony and Maria can be selected for the committee are

 = 8C1   =  \hspace{0.2cm}\binom{8}{1} = \frac{8!}{1! (8-1)!}  = \frac{8!}{1!\times 7!}  = \frac{8}{1}  = \hspace{0.1cm}8 \hspace{0.1cm}ways

6 0
3 years ago
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