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3 years ago

7

A traintravels 200 kilometers in 2.5 hours. whatis the trains average speed per hour

1 answer:

marusya05 [52]3 years ago

5 0

I think it may be 80 km/h?

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I NEED HELP can. someone help me please

Andrej [43]

Answer:

A & E

10-11= - 1

4y-5y= - y

4x5=20

4 x 2y = 8y

-3 x 3y = - 9y

-3 x 7 = - 21

20-21= - 1

8y - 9y = - y

7 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

Evaluate the expression:

FinnZ [79.3K]

Answer:

vw= 22

Step-by-step explanation:

To find the dot product of vw, multiply the corresponding numbers and add them.

v= <3, -8, -3> w= <-4, -2, -6>

vw= (3*-4)+(-8*-2)+(-3*-6)

vw= -12+16+18

vw= 4+18

vw= 22

6 0

3 years ago

In a study of a gender selection method used to increase the likelihood of a baby being born a girl, 2086 users of the method g

kipiarov [429]

Answer:

C : does not have statistical significance

Step-by-step explanation:

Because there is a 15% chance of getting that many girls by chance, the method - does not have statistical significance.

By this method, the percentage of girls = $1067/2086=0.5115$ or 51.15%

This type of method does not have practical significance.

6 0

3 years ago

How many patterns can i make with 2 red beads 1 yellow bead and 1 green bead

jeka57 [31]

9 different patterns

7 0

3 years ago