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hoa [83]
3 years ago
14

Which is bigger0.9 or 19/20

Mathematics
1 answer:
Mazyrski [523]3 years ago
7 0
19/20

19/20 = 0.95

0.9 < 0.95
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Th sum of three numbers is 64. The second number is 3 more than the first. The third number is
ladessa [460]
<span>Three numbers can be defined as x, y, and z.
x + y + z = 64
y = x+3
z = 2x - 11
.
substitute for y and z
x + (x+3) + (2x-11) = 64
4x -8 = 64
4x = 72

x = 18
.
y = x+3 = 21
z = 2x -11 = 2(18) -11 = 36-11 = 25
.
x + y + z = 18 + 21 + 25 = 64
Correct.
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Answer: The three numbers are 18, 21, and 25.</span>
8 0
3 years ago
A coin is tossed 5 times. Find the probability that none are heads. Find the probability that at most 2 are heads.
kiruha [24]
1- the answer is 1/32


each time we flip a coin the whole probabilities are 2
if we flip it 5 times
2*2*2*2*2=32

6 0
3 years ago
It is assumed that the test results for a class follow a normal distribution with a mean of 78 and a standard deviation of 36. I
HACTEHA [7]

Answer:

0.7143

- You know the minimum possible grade of the student

- You want to find out the probability that that grade which is greater than 72 is also greater than 84

- Expect the answer to be 0.7143

- The explanation/steps is given below

- The answer seems (and is) reasonable. You only created a new lower limit.

Step-by-step explanation:

Distribution Type: Normal

Mean: 78

Standard deviation: 36

Range of marks: [78 - 36], [78 + 36]  = [42 to 114]

If you know that a student's grade is greater than 72, what is the probability that it's greater than 84?

In this case, the full probability level is between 72 and the upper limit of 114 (instead of between 42 and 114). First, find the fraction of this probability.

[114 - 72] ÷ [114 - 42]  = 42/72  = 0.5833

So, the probability of a student's mark falling between 72 and 114 is 0.5833.

Now making this a whole interval, 114 - 72 = 42

What fraction of this interval of 42 will bear marks between 84 and 114?

[114 - 84]  = 30

30/42  = 0.7143

Because of the first part of the question "If you know (are sure) that a student's grade is greater than 72...", your answer stops at 0.7143, since 72 was used as the lower limit.

8 0
3 years ago
Help please WILL GIVE BRAINLEIST
JulsSmile [24]

Answer:

D. 0.85

Step-by-step explanation:

divide 6 by 5.10

6 0
3 years ago
The cost of a student ticket to the school play is $7. Write an equation that correctly relates the total cost, c, for a particu
Mazyrski [523]
C = $7s
independent variable ie the changing variable is s
dependent variable ie the non changing variable is c
8 0
3 years ago
Read 2 more answers
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