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3 years ago

Hey guys I need help on maths.

Mathematics

1 answer:

Pepsi [2]3 years ago

4 0

Answer:

x=122°

Step-by-step explanation:

sum of all interior angles in a quadrilateral = 360°

then ,

119+105+78+m = 360

m = 58

....

m+ x = 180 ( linear pair)

58+x = 180

x = 122

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Andreyy89

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5 0

4 years ago

HW 5.2

Marizza181 [45]

Answer:

The probability of no correct answers is 0.125 = 12.5%.

Step-by-step explanation:

For each question, there are only two possible outcomes. Either it is answered correctly, or it is not. The probability of a question being answered correctly is independent of any other question, which means that we use the binomial probability distribution to solve this question.

Binomial probability distribution

The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.

$P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}$

In which $C_{n,x}$ is the number of different combinations of x objects from a set of n elements, given by the following formula.

$C_{n,x} = \frac{n!}{x!(n-x)!}$

And p is the probability of X happening.

3 trials, each with probability of success (correct) given by p=0.50.

This means that $n = 3, p = 0.5$

The probability of no correct answers is

This is P(X = 0).

$P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}$

$P(X = 0) = C_{3,0}.(0.5)^{0}.(0.5)^{3} = 0.125$

The probability of no correct answers is 0.125 = 12.5%.

6 0

3 years ago

Susan uses the function p(x) = 4x to determine the perimeter of a square when she knows the side length, x. Which statements are

givi [52]

Answer:

Step-by-step explanation:

The perimeter is the dependent variable. TRUE

The length of the side of the square is the dependent variable. FALSE

The value of p(x) depends on the value of x. TRUE

The length of the side of the square is the independent variable. TRUE

The value p(x) can be found by multiplying p by x. FALSE

The perimeter is the independent variable. FALSE

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3 years ago

Alex collects coins that appreciate (increase in) value. At the store he has found three coins that he likes and can afford. Hel

Step2247 [10]

Answer:

Initial: 25 40 60

Year 10: 25.70 40.50 60.25

Year 20: 27.45 42.70 64.50

Step-by-step explanation:

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3 years ago

A normal distribution has a mean of 50 and a standard deviation of 10. What is

Rudik [331]

Answer:

A normal distribution has a mean of 50 and a standard deviation of 10. What is

the probability of selecting a number between 20 and 60?

6 0

3 years ago

Hey guys I need help on maths. ​

Hey guys I need help on maths.