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Amiraneli [1.4K]
3 years ago
14

The distribution of ages of runners in a marathon is approximately normal. The oldest participant was 80 and the youngest was 13

. Which of the following statements is true of the mean and median ages of the runners?
The mean is less than the median.
The mean is greater than the median.
The mean and median are approximately equal.
The actual ages of all runners are needed to decide.
Mathematics
1 answer:
igomit [66]3 years ago
8 0

Answer: The mean is greater than the median

when finding the mean then add the numbers then divide them by the amount of numbers there are when finding the median find the middle number and if there is no middle number divide the 2 and that should be your mean

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stich3 [128]

Answer:

11 cats

Step-by-step explanation:

I did trial and error.

I started with 16 cats and 17 dogs, so:

(16x$2.5) + (17x$4.5) = $116.5

The value is too low which means that they spent more money on the expensive side (i.e., dogs).

I ended up with 11 cats and 22 dogs, so:

(11x$2.5) + (22x$4.5) = $126.5

3 0
4 years ago
Using the quadratic formula to solve 5x = 6x²-3, what are the values of x?
Salsk061 [2.6K]

Answer:

\boxed{\sf{x =  \frac{5 \pm \sqrt{97} }{12} }}

Step-by-step explanation:

\sf{5x = 6 {x}^{2} - 3 }

\sf{0 = 6 {x}^{2} - 3 - 5x }

\sf{0 = 6 {x}^{2} - 5x - 3 }

  • a = 6
  • b = - 5
  • c = - 3

\sf{x =  \frac{ - b \pm \sqrt{ {b}^{2}  - 4ac} }{2a} }

\sf{x =  \frac{ - ( - 5) \pm \sqrt{ { - 5}^{2}  - 4(6)( - 3)} }{2(6)} }

\sf{x =  \frac{5 \pm \sqrt{ 25   + 72} }{12} }

\sf{x =  \frac{5 \pm \sqrt{97} }{12} }

8 0
2 years ago
The ratio of swordfish to marlins caught on a deep sea fishing trip was 20 to 15. If 24 marlins were caught, how many swordfish
Marysya12 [62]

Answer:

39

Step-by-step explanation:

7 0
3 years ago
What does 19+r=<br> PLEASE HELP
NemiM [27]
Okay so since there aren’t any values that r is equal to 19 plus r is equal to 19r. I’m pretty sure that’s the answer
4 0
3 years ago
3(g + 4) = 9<br> Need help
andrezito [222]

Answer:

g=-1

Step-by-step explanation:

3(g+4)=9

Divide both sides by 3.

g+4=  9/3

Divide 9 by 3 to get 3.

g+4=3

Subtract 4 from both sides.

g=3−4

Subtract 4 from 3 to get −1.

g=−1

7 0
3 years ago
Read 2 more answers
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