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inysia [295]
3 years ago
7

Coach Burns charted the change in his runners’ 5K times from the first race of the year to the second race of the year. Which st

udent improved the most by decreasing the time needed to run the race? PLEASE HELP IM ON A EXAM!!!
Mathematics
2 answers:
Alecsey [184]3 years ago
8 0

Answer:

student a

Step-by-step explanation:

i just took the exam

Andrews [41]3 years ago
4 0

Answer:

Student a

Step-by-step explanation:

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Put these over a common denominator 3/5 4/7?
Rama09 [41]
We can pick a common denominator by multiplying.

3*7/5*7= 21/35

4*5/7*5= 20/35

We have our common denom is 15.

Our fractions: 21/35 and 20/35
7 0
3 years ago
Read 2 more answers
Assume the random variable X has a binomial distribution with the given probability of obtaining a success. Find the following p
Lisa [10]

Answer:

0.0064

0.00032

Step-by-step explanation:

Given the details:

P(X > 3), n = 5, p = 0.2

The binomial distribution is related using the formula:

P(x = x) = nCx * p^x * q^(n-x)

q = 1 - p = 1 - 0.2 = 0.8

P(X > 3) = p(x = 4) + p(x = 5)

P(x = 4) = 5C4 * 0.2^4 * 0.8^1 = 5 * 0.2^4 * 0.8^1 = 0.0064

P(x = 5) = 5C5 * 0.2^5 * 0.8^0 = 1 * 0.2^5 * 0.8^0 = 0.00032

3 0
2 years ago
2) Eight is 5 less than<br> twice the number R.
posledela

Answer:

8-5 times R

Step-by-step explanation:

you subtract 8-5 to get that answer and then you do less than twice the number r i think this is correct hope it helps :)

7 0
3 years ago
) Which expression represents the change in the
Alla [95]

Answer:

Step-by-step explanation:

Patterns in Multiplication 75 ... 13. 1 __. 5 of 60 = 11. 1 __. 9 of 81 = 14. 1 __. 8. ⋅ 16 = 3. 10. 7. 9. 8. 12. 2. 10. 5 ... zeros in the product for the expression 600 ⋅ 500. 4-2. 1. 5__. 8. 5__. 7. 4. ... 15. 5,000. ×. 2. __. 18. 600. ×. 4. __. 7. 5__. 6. ⋅ 36 = 10. 2 __. 3. ⋅ 33 = 8. ... Solve the first problem with Place Value Sections.

3 0
3 years ago
How to you get the mean in math
nydimaria [60]
The "mean" is the "average" you're used to, where you add up all the numbers and then divide by the number of numbers.
5 0
3 years ago
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