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creativ13 [48]
3 years ago
10

A subway train makes six stops of equal length during its 21 km run. The train is actually moving for 20 minutes of the trip. At

most how long can the train remain at each station if the average speed for the trip, including stops, is to be at least 36 km/hr?
\frac{d}{t}  = r
​
Mathematics
1 answer:
photoshop1234 [79]3 years ago
3 0

Answer:

The subway train can stop for a maximum of 2.5 minutes on each stop.

Step-by-step explanation:

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(2.5, 1.3, 2.2, x), mean = 1.8
AleksAgata [21]

Answer:

<em><u>please mark me a brainliest</u></em>

\frac{2.5 + 1.3 + 2.2 + x}{4}  = 1.8

\frac{6 + x}{4}  = 1.8

6 + X = 1.8 * 4

6 + X = 7.2

X = 7.2 - 6

X = 1.2

So therefore the value of X is 1.2

Step-by-step explanation:

<em>Have a good day </em>

<em>Have a good day And I hope this will help</em>

5 0
2 years ago
Events a, b, and c in a sample space have p(a)=0.2, p(b)=0.4, and p(c)=0.1. find p(a ∪ b ∪
Julli [10]
If A and B are mutually independent, then \mathbb P(A\cup B)=\mathbb P(A)+\mathbb P(B) and \mathbb P(A\cap B)=0.

If A and C are independent, then \mathbb P(A\cap C)=\mathbb P(A)\cdot\mathbb P(C). Ditto for B and C.

The inclusion/exclusion principle says that

\mathbb P(A\cup B\cup C)=\mathbb P(A)+\mathbb P(B)+\mathbb P(C)-\mathbb P(A\cap B)-\mathbb P(A\cap C)-\mathbb P(B\cap C)+\mathbb P(A\cap B\cap C)

Since A and B are mutually exclusive, their intersection is the empty set. It then follows that A\cap B\cap C also is the empty set, so the last probability is also 0.

Plug in what we know:

\mathbb P(A\cup B\cup C)=0.2+0.4+0.1-0-0.2\cdot0.1-0.4\cdot0.1+0

\implies\mathbb P(A\cup B\cup C)=0.64
3 0
3 years ago
Someone help please
Helen [10]

Answer:

C

Step-by-step explanation:

If you look at the graph, you notice there is no data to determine the slope, but there (0,b) represents the y-intercept. So my guess is, they give you a clue what the slope is already, but if you notice the y-intercept lowers the linear line a few notches because (0,18) is lower than the (0,30). That is what I would choose as the answer

7 0
3 years ago
Bianca earned $399.60 after working for 18.5 hours. How much did she earn for one hour?​
Oxana [17]

Answer:

$21.6 in one hour

Step-by-step explanation:

to find one hour divide 399.60 into 18.5

8 0
3 years ago
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Liam's dad earns bonus miles for each mile that he flies on a trip. On his most recent trip, the pilot announced they were trave
vlada-n [284]

Answer:

880 bonus miles

Step-by-step explanation:

220 times 4 equals 880

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3 years ago
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