PLEASE HELP I AM REALLY CONFUsEd

Mathematics

1 answer:

Vitek1552 [10]3 years ago

5 0

63+ angle 4=180
-63. -63
Angle 4=117
Measure of angle 4 is equal to 117°

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Please help! Will mark brainliest!

zhuklara [117]

Answer:

5/2

Step-by-step explanation:

Move the 5^-3 to the denominator and add the exponents of like coefficents

6 0

3 years ago

Lola pulls two marbles from a bag containing four red marbles, four blue marbles, and 12 yellow marbles without replacing them.

grandymaker [24]

4/16 percentage because she already pulled four and didn't put them back or you would have had 4/20 percentage

8 0

3 years ago

Read 2 more answers

Consider a multiple choice exam with 10 questions, and with 4 possible answers to each question (labeled A, B, C, and D). 1a. Wh

mrs_skeptik [129]

Answer:

(1a) 9.54e-07 (1b) 0.9437 (2) $10^8$

Step-by-step explanation:

We have n = 10 questions. For each question in the multiple choice exam, we can choose the correct answer with probability p = 0.25 or an incorrect answer with probability q = 0.75 (just by guessing). Besides is reasonable to believe that questions are independent. Let X be the random variable that represents the number of correct answers (just by guessing) observed during the n = 10 questions, so, X have a binomial distribution.

(a) The probability of getting a perfect score just by guessing is

$P(X = 10) = 10C10(0.25)^{10}(0.75)^{10-10} = 9.54e-07$

(b) The probability of getting at least one question correct, just by guessing

$P(X\geq1) = \sum_{x=1}^{x=10}10Cx(0.25)^{x}(0.75)^{(10-x)} = 0.9437$

2. Each RUID is 9-digits long, there are 10 digits, each of the nine positions for a digit of the RUID has 10 posibilities except the 4th and 5th positions which must be both 0. For the multiplication rule there can be $(10)^3(1)(1)(10)^5 = 10^8$ different RUIDS.