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miss Akunina [59]
2 years ago
6

Someone help me please

Mathematics
1 answer:
Studentka2010 [4]2 years ago
4 0

Step-by-step explanation:

The slope of the line passing through two points is given by,

\frac{y2 - y1}{x2 - x1}

13)

\frac{(0 - y)}{(0 - 2)}  =  (\frac{ - 3}{2} )

\frac{ - y}{ - 2}  =  \frac{ - 3}{2}

y =  - 3

option D

14)

\frac{ ( - 3 - y)}{(1 + 5)}  =  \frac{ - 1}{6}

\frac{ - 3 - y}{6}  =  \frac{ - 1}{6}

- 3 - y =  - 1

- y =  - 1 + 3 = 2

y =  - 2

option C

15)

\frac{(y - 4)}{( - 5 + 1)}  =  \frac{1}{4}

\frac{y - 4}{ - 4}  =  \frac{1}{4}

- y + 4 = 1

- y = 1 - 4 =  - 3

y = 3

option B

16)

\frac{(y + 3)}{( - 4 - 3)}  =  \frac{ - 3}{7}

- (y + 3) =  - 3

y = 3 - 3 = 0

option C

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Answer:

if exterior angle is 10 degrees, then interior angle is 180 -10 = 170 deg.

Each trinaglke inside the polygon will be isosceles with two angles of 170/2 - 85 degrees each.

So, angle at centre = 180 -170 = 10 deg.

Ttal angle at centre = 360 deg.

No of sides = 360 /10 = 36 sided polygon.

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jonny [76]

-3x(-7) = -3(-2)(-7) ⇒ -42

-42 would be the answer.

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Which expression is equivalent to the number 144?
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2 years ago
A real estate agent has 12 properties that she shows. She feels that there is a 30% chance of selling any one property during a
Ronch [10]

Answer:

0.2528 = 25.28% probability of selling no more than 2 properties in one week.

Step-by-step explanation:

For each property, there are only two possible outcomes. Either they are sold, or they are not. The chance of selling any one property is independent of selling another property, which means that the binomial probability distribution is used 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.

A real estate agent has 12 properties that she shows.

This means that n = 12

She feels that there is a 30% chance of selling any one property during a week.

This means that p = 0.3

Compute the probability of selling no more than 2 properties in one week.

2 or less sold, which is:

P(X \leq 2) = P(X = 0) + P(X = 1) + P(X = 2)

In which

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

P(X = 0) = C_{12,0}.(0.3)^{0}.(0.7)^{12} = 0.0138

P(X = 1) = C_{12,1}.(0.3)^{1}.(0.7)^{11} = 0.0712

P(X = 2) = C_{12,2}.(0.3)^{2}.(0.7)^{10} = 0.1678

Then

P(X \leq 2) = P(X = 0) + P(X = 1) + P(X = 2) = 0.0138 + 0.0712 + 0.1678 = 0.2528

0.2528 = 25.28% probability of selling no more than 2 properties in one week.

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