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3 years ago

8-1×0+2÷2=? It looks easy, so many different results.

Mathematics

2 answers:

kvasek [131]3 years ago

8 0

You have to use PEMDAS.

$8-1*0+2/2 \\ \\ 8-0+2/2 \\ \\ 8-0+1 \\ \\ 8+1 \\ \\ 9$

FromTheMoon [43]3 years ago

7 0

$8 - (1 X 0 ) + ( \frac{2}{2} ) = 8 - 0 + 1 = 9$

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Line pq is the perpendicular bisector of line MN, what is QN?

GREYUIT [131]

We know that
if PQ <span>is the perpendicular bisector of line MN
then
MQ=QM
and
NP=MP
so
6x+1=10x-17----------> 10x-6x=17+1-----> 4x=18---------> x=18/4----> x=4.5

QN=2x+5-----> QN=2*4.5+5-----> QN=14

the answer is
QN is 14</span>

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3 years ago

In general, the probability that a blood donor has Type A blood is 0.40.Consider 8 randomly chosen blood donors, what is the pro

postnew [5]

Answer:

The probability that more than half of them have Type A blood in the sample of 8 randomly chosen donors is P(X>4)=0.1738.

Step-by-step explanation:

This can be modeled as a binomial random variable with n=8 and p=0.4.

The probability that k individuals in the sample have Type A blood can be calculated as:

$P(x=k) = \dbinom{n}{k} p^{k}(1-p)^{n-k}\\\\\\P(x=k) = \dbinom{8}{k} 0.4^{k} 0.6^{8-k}\\\\\\$

Then, we can calculate the probability that more than 8/2=4 have Type A blood as:

$P(X>4)=P(X=5)+P(X=6)+P(X=7)+P(X=8)\\\\\\P(x=5) = \dbinom{8}{5} p^{5}(1-p)^{3}=56*0.0102*0.216=0.1239\\\\\\P(x=6) = \dbinom{8}{6} p^{6}(1-p)^{2}=28*0.0041*0.36=0.0413\\\\\\P(x=7) = \dbinom{8}{7} p^{7}(1-p)^{1}=8*0.0016*0.6=0.0079\\\\\\P(x=8) = \dbinom{8}{8} p^{8}(1-p)^{0}=1*0.0007*1=0.0007\\\\\\\\P(X>4)=0.1239+0.0413+0.0079+0.0007=0.1738$

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3 years ago

What is the total surface area of the solid? A rectangular prism with a length of 14 centimeters, width of 10 centimeters and he

Schach [20]

Answer:

i think it is the 2nd option.

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Bill is 6 years younger than amy.the sum of their ages is 22.how old will each of them be in 8 years

otez555 [7]

B=A-6
A+B=22
substitute: A+(A-6)=22 =>A=14
B=14-6=8
8 years later, Amy will be 22, Bill will be 14

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3 years ago

Which is greater: pi or -3?

Anon25 [30]

Answer:

> -3

Step-by-step explanation:

Pi can be simplified down to 3.14. That is a positive number. -3 is a negative number. Because positive numbers are greater than negative numbers, pi > 3.

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3 years ago

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