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leonid [27]
4 years ago
13

In 1991, an American, Ann Trason, set a world record by running 1000 km in 7 hours, 50 minutes, and 9 seconds. Which is the best

estimate of her average speed? (HINT: Think rate)
A. 14 km per hr
B. 12 km per hr
C. 18 km per hr
D. 16 km per hr
Mathematics
1 answer:
Lyrx [107]4 years ago
5 0
We know, speed = distance / time
Here, distance = 1000 Km
t = 7 5/6 = 47/6 hours

S = 1000 * 6 / 47
S = 6000 / 47
S = 127.65 Km/h

[ Please check your distance would be 100 Km i guess, if yes, then your answer will be B) 12 Km/hr ]

Hope this helps!
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egoroff_w [7]

Answer: C) P(blue) = 70%, P(green) = 30%, P(blue and green) = 21%

Step-by-step explanation:

Given probabilities P(A) AND P(B) are independent, the probability that both events to occur is given by:

P(A)∩P(B)

thus from the example, independent events will be:

P(blue)=70%, P(green)=30%, P(blue and green)=21%

Because:

P(blue)∩P(green)=0.7×0.3=0.21=21%

7 0
2 years ago
3x-2y=2<br> i always get mixed up in the final answer y=1 -3/2x 0r y= 1 +-3/2x ?
marishachu [46]

Answer:

Both answers are correct

Step-by-step explanation:

both y = 1 - 3/2x and y = 1 + -3/2x are correct answers, it is just that y= 1 - 3/2x is the simpler version. Adding a negative number is the same as subtracting a positive.

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4 years ago
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Answer:

Well to find the x-intercept, substitute in 0 for y and solve for x. To find the Y-intercept, substitute in 0 for x and solve for y

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Step-by-step explanation:


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Alfredo is buying a watch for $200. He will make an initial payment of $50 and
Bogdan [553]

Answer:

Step-by-step explanation:

There is nothing to choose from.

However, 200-50 down payment will leave 150 left on the watch. 150 divided 15 a month is 10 months.

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4 0
3 years ago
Joe hosted a praty 582 people came he charged 15 dollars for balcony seats and 10 dollars for ground seats how many people bout
hoa [83]

Answer:

Ground seats = 450 people

Balcony seats= 132 people

Step-by-step explanation:

Hi, to answer this question we have to write a system of equations:

The money raised (6480) must be equal to the product of the charge per balcony seats (15) and the number of balcony seats sold (b) ;plus the product of the charge per ground seats (10) and the number of ground seats sold (g)

15 b +10 g =6480

The total number of people (582) must be equal to the sum of balcony seats sold (b) and ground seats sold (g).

b+g = 582

Multiplying the second equation by 10, and subtracting it to the first equation:

15 b +10 g =6480

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10b+10g = 5820

__________

5b =660

Solving for b

b = 660/5 = 132

Substituting b=132 in the second equation:

132+g = 582

g= 582-132

g= 450

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3 years ago
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