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Vinvika [58]
3 years ago
9

What is the speed of a dolphin that travels 200 miles in 8 hours

Mathematics
1 answer:
lilavasa [31]3 years ago
8 0

Answer: 25 miles per hour

Step-by-step explanation:

Since the dolphin travels at a rate of 200 miles per hour, in order to find the speed of the dolphin for only one hour, you must divide 200/8. Which gives your 25 mph.

Hope this helps!

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Computers from a particular company are found to last on average for 24 months without any hardware malfunction with a standard
vodomira [7]

Answer:

At least 68% of observations lie between 22 and 26 months.

Step-by-step explanation:

The Empirical Rule states that, for a normally distributed random variable:

68% of the measures are within 1 standard deviation of the mean.

95% of the measures are within 2 standard deviation of the mean.

99.7% of the measures are within 3 standard deviations of the mean.

In this problem, we have that:

Mean = 24

Standard deviation = 2

22 = 24 - 2

22 is one standard deviation below the mean

26 = 24 + 2

26 is one standard deviation above the mean.

So, by the empirical rule, at least 68% of observations lie between 22 and 26 months.

8 0
3 years ago
Use the substitution method to solve.<br><br> y=5−3x<br> 5x−4y=−3
Vadim26 [7]
Well just substitute y (the first equation) into the second equation.
So
5x-4(5-3x)=-3
Then just solve the equation from there.
5x-20+12x=-3
17x=17
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and if you need y, y=2
6 0
3 years ago
Which graph represents the inequality y&gt;3−x?
nekit [7.7K]

Answer:

B

Step-by-step explanation:

The first step is to draw the line y = 3 - x to see what the line itself looks like. Is it going from left to right as in A and C is going up as you go  from right to left as in B and D? The graph on the left (below) gives you the answer. It is going up as you progress from right to left.

The next step is to answer which is it: B or D.

y has to be above the line. it is B. See the graph below on the right.

4 0
3 years ago
Answer plz plz for brainleiest
Archy [21]

Answer:

-.5

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
1. What is the slope of a line that passses through (-1,-5) and (6, 8)?
elena-s [515]

Answer:

Step One: Identify two points on the line.

Step Two: Select one to be (x1, y1) and the other to be (x2, y2).

Step Three: Use the slope equation to calculate slope.

4 0
3 years ago
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