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inna [77]
4 years ago
10

Will give brainliest to correct answer.

Mathematics
2 answers:
ELEN [110]4 years ago
8 0
The answer is the first one: f(x)= 25 / ( 70-x). 
 Because the current, x, will be subtracted from the speed given to give the final speed, and the25 miles is the distance. Time = Distance / Speed.                                               
mario62 [17]4 years ago
3 0
To solve this problem, we can already start looking at which equation we can make, since we have all the data. To find the time it takes, we know that we will have to have the distance on the top and the speed on the bottom. That eliminates the bottom two options. But, since we know that the speedboat is moving against the current of the lake, that means we subtract x from the total speed, 70. That means that the answer to this problem is f(x) = \frac{25}{70-x}
You might be interested in
suppose a traveler is selected from this sample at random. Let event A = home sharing and event B = fly. Are events A and B inde
Schach [20]

Answer:

Yes, P(A) = P(A|B)

Step-by-step explanation:

The context of the question is incomplete but I've assumed logically what it might be;

Whether a traveller flies or doesn't fly to their destination is unrelated to whether they home share or not;

Therefore, they are independent;

Independent events are events where the outcome of one event has no effect on the probabilities of the outcomes from a second event;

This can be represented mathematically as: P(A) = P(A|B);

The corollary of this is P(B) = P(B|A);

A common example easily understood would be if you flip a coin, there is a 50% chance of heads and 50% chance of tails;

If I flip and gets a heads first, the probability of getting a heads or tails on the second, third or tenth flip is going to be unchanged, i.e. 50% chance of heads and 50% chance of tails

5 0
3 years ago
4. Given the image to the right, name a pair of angles that are consecutive exterior<br> angles.
Eva8 [605]

Answer:

<7 and <2

<1 and < 2

4 0
3 years ago
7/8 minus1/4 minus 1/2
slava [35]

7/8 minus1/4 minus 1/2

7/8 - 1/4 - 1/2 =

(1 × 7)/(1 × 8) - (2 × 1)/(2 × 4) - (4 × 1)/(4 × 2) =

7/8 - 2/8 - 4/8 =

(7 - 2 - 4)/8 =

1/8

the answer is 1/8

7 0
3 years ago
How many m in 300 cm? show steps.​
Alexxandr [17]

Answer:

3m

Step-by-step explanation:

we know that u know but ok

there are 100 cm in one meter .

this means 300 centimeters would be divided by 100.

  • 300 divided by 100 is 3
5 0
2 years ago
A bag contains purple marbles and white marbles, 96 in total. The number of purple marbles is 6 less than 5 times the number of
love history [14]
<em /><em>PURPLE MARBLES=P
WHITE MARBLES=W

</em>First, write out an equation showing the number of purple marbles.
P=5W-6
Then, write out the main equation.
W+P=96
W+5W-6=96
Add 6 to both sides.
W+5W=102
6W=102
Divide both sides by 6
W=17
Now that we know there are 17 white marbles, we can go back to the equation about how many purple marbles there are. 
P=5W-6
Plug in the value for W, which is 17.
P=5(17)-6
P=85-6
P=79

To make sure your answer is correct, check your work by plugging in the values for P+W=96.
79+17=96
Answer: There are 79 purple marbles.
8 0
3 years ago
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