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Tanzania [10]
2 years ago
8

Marcela finished the race in 75.8 minutes. Rebecca finished the race in 8.1/2 minutes faster then Marcela. How many minutes did

it take Rebecca to finish the race?
Mathematics
1 answer:
Bond [772]2 years ago
5 0

Answer: 67.3

Step-by-step explanation:

turn the "\frac{1}{2}" into .5 and substract

75.8

-  8.5

----------

67.3

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Which of the following is a polynomial with roots 4, 6, and −7?
aleksklad [387]
Try plugging in 4,6, and -7 into the x's 
8 0
3 years ago
Read 2 more answers
Find the range for the measurement of the third side of a triangle, x, given the measures of the two sides: 6 ft and 13 ft.
Rudik [331]
|13-6| < x < |13+6|

So the range will be:

7 < x < 19
8 0
3 years ago
Hi, am I supposed to find the stationary points of the f(x) and g(x) then use the distance formula to solve for the final answer
nikdorinn [45]

9514 1404 393

Answer:

  maximum difference is 38 at x = -3

Step-by-step explanation:

This is nicely solved by a graphing calculator, which can plot the difference between the functions. The attached shows the maximum difference on the given interval is 38 at x = -3.

__

Ordinarily, the distance between curves is measured vertically. Here that means you're interested in finding the stationary points of the difference between the functions, along with that difference at the ends of the interval. The maximum difference magnitude is what you're interested in.

  h(x) = g(x) -f(x) = (2x³ +5x² -15x) -(x³ +3x² -2) = x³ +2x² -15x +2

Then the derivative is ...

  h'(x) = 3x² +4x -15 = (x +3)(3x -5)

This has zeros (stationary points) at x = -3 and x = 5/3. The values of h(x) of concern are those at x=-5, -3, 5/3, 3. These are shown in the attached table.

The maximum difference between f(x) and g(x) is 38 at x = -3.

4 0
3 years ago
Without using a calculator, order the following numbers from least to greatest . 5 sqrt(14) 4
Flura [38]

Answer:

.5, sqrt 14, 4

Step-by-step explanation:

.5, 3.7416, 4

8 0
2 years ago
I need Smart people:)
Blababa [14]

Answer:

What? I do not even see what you are trying to get at. I have a masters in math so I could help. Whats the question you are having an issue with ?

Step-by-step explanation:

7 0
3 years ago
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