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3 years ago

John is measuring a piece of glass to fit in a triangular frame. He can only remember

Mathematics

1 answer:

blagie [28]3 years ago

6 0

Answer: (c)

Step-by-step explanation:

Given

length of two sides of a triangle is 6 cm and 11 cm

In a triangle length of the third side lies between the sum and subtraction of the other two sides

Suppose x is the length of the third side so

$11-6$

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Find the amplitude of y = -4 sin x.

lyudmila [28]

Answer:
4
Explanation:
The amplitude of a sine function is the absolute value of the coefficient of sin(in other words, the absolute value of the number multiplying the sin)
In this case, that is |-4|=4

6 0

3 years ago

The difference of c and 10<br> A. c+10<br> B. 10c<br> C.10divide c<br> D. c-10

prohojiy [21]

The correct answer is d

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4 years ago

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Komok [63]

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3 years ago

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Discrete R.V. Assume a student shows up for EGR 280 completely unprepared and the instructor gives a pop quiz. Assume there are

Tom [10]

Answer:

a) p=0.2

b) probability of passing is 0.01696

c) The expected value of correct questions is 1.2

Step-by-step explanation:

a) Since each question has 5 options, all of them equally likely, and only one correct answer, then the probability of having a correct answer is 1/5 = 0.2.

b) Let X be the number of correct answers. We will model this situation by considering X as a binomial random variable with a success probability of p=0.2 and having n=6 samples. We have the following for k=0,1,2,3,4,5,6

$P(X=k) = \binom{n}{k}p^{k}(1-p)^{n-k} = \binom{6}{k}0.2^{k}(0.8)^{6-k}$ .

Recall that $\binom{n}{k}= \frac{n!}{k!(n-k)!}$ In this case, the student passes if X is at least four correct questions, then

$P(X\geq 4) = P(X=4)+P(X=5)+P(X=6)=\binom{6}{4}0.2^{4}(0.8)^{6-4}+\binom{6}{5}0.2^{5}(0.8)^{6-5}+\binom{6}{6}0.2^{6}(0.8)^{6-6}= 0.01696$

c)The expected value of a binomial random variable with parameters n and p is $E[X] = np$ . IN our case, n=6 and p =0.2. Then the expected value of correct answers is $6\cdot 0.2 = 1.2$

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4 years ago

15 is 70% of what number

damaskus [11]

To find 70% percent of a number, multiply the number by 0.7. in this instance , 0.7 x 15= 10.5 .therefore, 70 percent of 15 is equal to 10.5

3 0

3 years ago

Read 2 more answers