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Sauron [17]
3 years ago
10

You drive for 30 min at 100 km/h and then stop for 15 min. you then drive for 45 min and 80 km/h. you average speed for the enti

re trip is
Mathematics
1 answer:
Rasek [7]3 years ago
4 0
  <span>So basically you drove 1/2 hour at 100 km/h which works out to a total travel distance of 50 km (you multiply a 1/2 by 100) 

Then you drove for 3/4 hour at 80 Km/h which works out to a total travel distance of 60 km (multiply 3/4 by 80) 

 now you know that you traveled a total of 110 km 

now add up all the times 30 + 15 + 45 = 90 minutes or 1.5 hours 

 now you know that you traveled a total of 110 km in 1.5 hours 

so your average speed is 73.33 km/h for the entire trip</span>
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enot [183]
B: -8
8 times 1 = 8, and since there is a negative in front of the 1 when you are multiplying, it should be -8/ 
7 0
3 years ago
Read 2 more answers
Please I need help
solong [7]

9514 1404 393

Answer:

  (c)  27x^11 +51x^7 +9x^6 -60x^5 +17x^2 -20

Step-by-step explanation:

As with many multiple-choice questions, you only need to look at something that will discriminate the correct answer from the wrong one.

The highest-degree product term is the product of the highest-degree terms in the factors:

  (3x^5)(9x^6) = 27x^11

This matches choice C only.

_____

In case you're interested in actually performing the rest of the multiplication, the distributive property applies.

  (1 +3x^5)(17x^2 +9x^6 -20)

  = 1(17x^2 +9x^6 -20) +3x^5(17x^2 +9x^6 -20)

  = 17x^2 +9x^6 -20 +51x^7 +27x^11 -60x^5

Writing these terms in order of decreasing exponents gives ...

  = 27x^11 +51x^7 +9x^6 -60x^5 +17x^2 -20

7 0
3 years ago
The temperature at 6:00 am was -12 Fahrenheit. The temperature increased by 1/2 Fahrenheit each hour for 6 hours. What was the t
zlopas [31]

Answer: -9°F

Step-by-step explanation:

From the question, we are told that the temperature at 6:00 am was -12 Fahrenheit and that the temperature increased by 1/2 Fahrenheit each hour for 6 hours.

The temperature, in degrees Fahrenheit, at noon would be:

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6 0
3 years ago
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So just convert to a common form
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so 1.38, 1.43, 1.40
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3 years ago
The problem -2x=9 equals the answer x=-4.5...is that correct or incorrect?
erastovalidia [21]
-2x=9|:(-2)\\&#10;x=-4.5&#10;

Yes.
5 0
3 years ago
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