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Veseljchak [2.6K]
3 years ago
10

Daisha is sitting on the bus on the way home from school and is thinking

Mathematics
1 answer:
Zina [86]3 years ago
5 0

Answer:

Step-by-step explanation:

P(of an event)=No. of possibilities of the event/total no. of events

a)P(completes exactly one assignment)=1/3

b) P(completes more than one assignment)=2/3

c)P(at least one assignment)=3/3=1

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Which table represents the equation y = -2x + 17?
Alexeev081 [22]
<h3>Answer: Choice A</h3>

Explanation:

Each table has x = 10 in it. Plug this value into the given equation.

y = -2x+17

y = -2*10+17

y = -20+17

y = -3

The input x = 10 leads to the output y = -3. Table A shows this in the middle-most row. So that's why choice A is the answer. The other tables have x = 10 lead to y values that aren't -3 (eg: choice D has x = 10 lead to y = 12), so we can rule them out.

7 0
2 years ago
According to an​ airline, flights on a certain route are on time 80 ​% of the time. suppose 10 flights are randomly selected and
natulia [17]
<span>(a) This is a binomial experiment since there are only two possible results for each data point: a flight is either on time (p = 80% = 0.8) or late (q = 1 - p = 1 - 0.8 = 0.2).
​(b) Using the formula:</span><span>
P(r out of n) = (nCr)(p^r)(q^(n-r)), where n = 10 flights, r = the number of flights that arrive on time:
P(7/10) = (10C7)(0.8)^7 (0.2)^(10 - 7) = 0.2013
Therefore, there is a 0.2013 chance that exactly 7 of 10 flights will arrive on time.
​(c) Fewer than 7 flights are on time means that we must add up the probabilities for P(0/10) up to P(6/10).
Following the same formula (this can be done using a summation on a calculator, or using Excel, to make things faster):
P(0/10) + P(1/10) + ... + P(6/10) = 0.1209
This means that there is a 0.1209 chance that less than 7 flights will be on time.
​(d) The probability that at least 7 flights are on time is the exact opposite of part (c), where less than 7 flights are on time. So instead of calculating each formula from scratch, we can simply subtract the answer in part (c) from 1.
1 - 0.1209 = 0.8791.
So there is a 0.8791 chance that at least 7 flights arrive on time.
(e) For this, we must add up P(5/10) + P(6/10) + P(7/10), which gives us
0.0264 + 0.0881 + 0.2013 = 0.3158, so the probability that between 5 to 7 flights arrive on time is 0.3158.
</span>
6 0
3 years ago
Give the values of a, b, and c needed to write the equation's general form.. (5 + x)(5 - x) = 7. A = 1; B = 0; C = -18. A = 25;
Licemer1 [7]
The general form of an equation is A x^{2} +Bx+C=0. Solving for  (5+X)(5-X)=7 by multiplying the factors and subtratcting 7 on both sides gives the equation x^{2} -18=0, so 
A = 1
B = 0
C = -18
6 0
3 years ago
Suppose you multiply a whole number greater than 1 by the fraction 3/5. Will the product be greater than, less than, or equal to
Virty [35]
Greater than. For example if you multiply 2 by 3/5 the answer is 1 1/5 which is greater than 3/5
4 0
3 years ago
Read 2 more answers
According to a bridal magazine, the average cost of a wedding reception for an American wedding is $8213. Assume that the averag
amm1812

Answer:

Point estimate of the corresponding population mean = $8,213

Step-by-step explanation:

Given:

Average cost of a wedding reception (x) = $8,213

Total number of sample (n) = 450

Standard deviation = $2185

Find:

Point estimate of the corresponding population mean

Computation:

Average cost of a wedding reception (x) = Point estimate of the corresponding population mean

Point estimate of the corresponding population mean = $8,213

7 0
3 years ago
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