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2 years ago

A boy runs a distance of 200km in 25seconds. What is his average speed

Mathematics

2 answers:

IrinaK [193]2 years ago

8 0

Answer:

8 km average speed

Step-by-step explanation:

Alisiya [41]2 years ago

7 0

Answer:

His average speed is 28,800 km per hour.

Step-by-step explanation:

He runs 480 km per minute. Then I multiply 480 by 60 to get 28,800 km.

:))

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4) An arithmetic sequence has a 7th term of 54 and a 13th term of 94. Find the common difference

san4es73 [151]

Answer:

20/3

Step-by-step explanation:

Every nth term takes the form of a + n*d, where a is the first term.

So 7th term = (54 = a + 7d), 13th term = (94 = a + 13d).

equate them both:

94 - 13d = 54 - 7d

40 = 6d

d = 40/6

6 0

3 years ago

A cab ride f I'm your home to the airport cost $23.47. If you want to tip the cab driver close to 10 percent of the fare, how mu

Westkost [7]

10% of 23.47 is 2.347 so about $2.35

5 0

3 years ago

A child gets 20 heads out of 30 tosses of a coin. If he declared the chance of getting a head with that coin were 2/3, that woul

Komok [63]

Answer: Experimental probability

Step-by-step explanation:

There are two kinds of probability: Theoretical probability and Experimental probability.

To calculate theoretical probability we divide favorable outcomes by total outcomes.

To calculate experimental probability we divide number of times an event occurs by the total number of trials or times the activity is performed.

Here, A child gets 20 heads out of 30 tosses of a coin. If he declared the chance of getting a head with that coin were 2/3, which is dependent on the activity he performed, thus it is an experimental probability.

3 0

3 years ago

You deposit $5000 in an account earning 8% interest compounded monthly. How much will you have in the account in 15 years?

Rasek [7]

$\bf ~~~~~~ \textit{Compound Interest Earned Amount} \\\\ A=P\left(1+\frac{r}{n}\right)^{nt} \quad \begin{cases} A=\textit{accumulated amount}\\ P=\textit{original amount deposited}\dotfill &\$5000\\ r=rate\to 8\%\to \frac{8}{100}\dotfill &0.08\\ n= \begin{array}{llll} \textit{times it compounds per year}\\ \textit{monthly, thus twelve} \end{array}\dotfill &12\\ t=years\dotfill &15 \end{cases}$

$\bf A=5000\left(1+\frac{0.08}{12}\right)^{12\cdot 15}\implies A=5000(1.00\overline{66})^{180}\implies A\approx 16534.61$

5 0

3 years ago

Need help !!!Divide 5a^2 + 6a - 9 into 25a^4 + 19a^2 - a - 78.

lana [24]

Hello,

Maybe i have not understood "into".

$\dfrac{25a^4+19a^2-a-78}{5a^2+6a-9} =5a^2-6a+20+ \dfrac{-175a+102}{5a^2+6a-9}$

6 0

3 years ago