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faltersainse [42]
3 years ago
11

An airplane 30,000 feet above the ground begins descending at the rate of 2000 feet per minute. Assume the plane continues at th

e same rate of the descent. The planes height and minutes above the ground are related to each other. Identify the vari
ables in this situation: x=_____ y=____
What is the given information in this problem ( find all that apply)?
Y- intercept____ slope___one point (___,___)
second point: (___,___)
in this situation:
Mathematics
1 answer:
Aleonysh [2.5K]3 years ago
4 0
If we call y the height of the plane, we know when the time (x) is 0, the height is 30000. So let's write that in:

y = 30000 + (0)

Then, for every increase of a minute (x increases by 1), the height reduces by 2000. This can be written as:

y = 30000 - 2000x

Using what we know about y = mx+c equations, the slope of the line is -2000, and the y-intercept is (0, 30000).

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Line L passes through point (2, -5) and is perpendicular to the line with equation y = 7. Determine the equation of line L.
Wittaler [7]
<h3>Answer:</h3>

A) x = 2

<h3>Explanation:</h3>

<em>Try the answers</em>

Of the offered choices, the only ones that go through the given point are ...

... x = 2

... y = -5

The latter is horizontal and parallel to y = 7, so is not the choice you want. The appropriate choice is ...

... A) x = 2

_____

<em>Figure out the answer</em>

The given line is horizontal, so the line you want is vertical—of the form ...

... x = constant

The constant must be chosen so the line will go through a point with x=2. It should be obvious that the constant must be 2.

... x = 2 is perpendicular to y = 7 and goes through (2, -5).

8 0
3 years ago
Candice buys a board thats is 12 feet long. the store incorrectly measures and prices the board at 13.2 feet. whats the percent
podryga [215]
Determine first the difference between the incorrectly measured board and the correct one. The subtraction would result to 1.2 ft. The percent error is calculated by dividing this value by the correct value and then multiply by 100%. (1.2 ft / 12 ft) x 100% = 100%. Thus, the percent error is 10%. 
7 0
3 years ago
Read 2 more answers
Select the correct answer. Twenty students in Class A and 20 students in Class B were asked how many hours they took to prepare
Lunna [17]

Answer:

B: The mean study time of students in Class B is less than students in Class A.

Step-by-step explanation:

To find out why answer B is the right answer, I will give you facts from each option.

Option A is false. <em>The mean study time in Class A is 4.8. Meanwhile in Class B it is 4. For Class A, sum up the 20 study times which is 96 and divide them by 20, you will get 4.8 hours of mean study time. For Class B, the sum of the 20 study times is 80, which divided by 20 will be 4. </em>

Option B is True. <em>See previous explanation. </em>

Option C is False. <em>The median study time in Class B is 4. The median study time in Class A is 4.8, </em>

Option D is False. <em>The range in Class A is from 2 to 8. The range in Class B is from 2 to 7. </em>

Option E is False: <em>The mean and median study time of these classes is different.</em>

6 0
3 years ago
Read 2 more answers
Evaluate the expression:<br> 3x + 2y when X=10 and y=4
sveta [45]

Answer:

38

Step-by-step explanation:

3x + 2y when X=10 and y=4

3(10) + 2(4)

30 + 8

38

5 0
3 years ago
Read 2 more answers
Estimate the sum 7.36 + 9.47​
arsen [322]

Answer:

16.83

Step-by-step explanation:

7.36

+ 9.47

----------

16.83

4 0
3 years ago
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