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Gennadij [26K]
3 years ago
12

HELPPP! I need step by step!

Mathematics
2 answers:
DochEvi [55]3 years ago
5 0

Answer:

Step-by-step explanation:

P(A) = 144/200  = 0.72

P(B) = 141/200  = 0.705 = 0.71

The two probabilities are similar but different. From the table, a large number of students who play guitar are also left-handed: 116. So the two probabilities are NOT independent - if u are left-handed, u are more likely to play guitar n vice versa.

skad [1K]3 years ago
3 0

Answer:

Step-by-step explanation:

P(A) = Probability of a student knowing how to play guitar

= no. of students who know how to play guitar / total no. of student

= 144/200

= 0.72

P(B) = Probability of a student is left-handed

=  no. of students who is left-handed / total no. of student

= 141/200

= 0.705

P(A) and P(B) are calculated to be two real numbers and do not depend on each other. So event A and B are independent.

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Order from greatest to least 55% of 180 30% of 260 12% of 700
abruzzese [7]

Answer: 55% of 180, 12% of 700, and 30% of 260.

Step-by-step explanation:

55% of 180 = 99…

30% of 260 = 78…

and 12% 700 = 84…

8 0
3 years ago
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Determine whether each system of equations has no solution, one solution, or infinitely many solutions
guapka [62]
It has one solution

7 0
3 years ago
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Please help me tysm!
Nikolay [14]

Answer:

Z.

Step-by-step explanation:

I wrote down the subject with the number of students. I looked one by one to see if the number of students with the subject matched with the graph.  Then I finally found that the last graph matched with what I written down.

7 0
3 years ago
Maria works as an electrician and earns $24.68/h. If she worked for 15 hours on one job, how much did she earn? *
rodikova [14]

Answer:

she would have $370.20

Step-by-step explanation:

24.68*15=370.2

8 0
3 years ago
Answer question 11 and 12
Darya [45]

Answer:

11.  y = -2x - 4.

12.  y = x - 5

Step-by-step explanation:

11. the given points on the line are ((-2, 0) and (0, -4)

The slope of the line

=  difference in y values / corresponding difference in x values

= ( - 4 - 0) / 0 - (-2))

= -4 / 2

= -2.

The general form of a straight line is y = mx + c where m = the slope and c = y value of the intercept on the y-axis.

So  the equation is:

y = -2x - 4.

12.

The points are (1, -4) and (3, -2).

The slope is    (-2 - (-4)) / (3 - 1)

=  2/2

= 1.

So the equation is  

y = 1x + c

We find c by plugging in the point (1, -4):

-4 = 1 + c

c = -4 - 1

c = -5.

The equation is y = x - 5.

5 0
3 years ago
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