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IceJOKER [234]
3 years ago
10

HELP MATHEMATICS!!!

Mathematics
1 answer:
jenyasd209 [6]3 years ago
4 0
20 marbles in all of which: 5 are blue, 5 are red, 5 are white and 5 are black

Drawing 2 marbles without replacing the 1st blue drawn

P(2 blue) = 5/20*4/19 = 20/380 = 1/19

Drawing 2 marbles with replacement of the first blue one

P(2 blue) = 5/20*5/20 = 25/400 = 1//16

1/16 > 1/19
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A cast member is selling balloons on Main Street. He has 8
xeze [42]

Answer:

4/76 or simplified as 1/19

Step-by-step explanation:

5/20 is for the probability of the first balloon

4/19 is for the probability of the second balloon

5/20 can be simplified to 1/4 so 1/4 x 4/19 = 4/76

4/76 can also be simplified to 1/19

3 0
3 years ago
Which is an equation of a direct proportion?<br><br> a.y=1/6x+6 b.y=6/x<br> c.y=6x-6 d.y=6x
Amanda [17]

Answer:

Option D. y=6x

Step-by-step explanation:

we know that

A relationship between two variables, x, and y, represent a direct variation if it can be expressed in the form y/x=k or y=kx

In a proportional relationship the constant of proportionality k is equal to the slope m of the line and the line passes through the origin

<em>Verify each case</em>

case a) y=(1/6)x+6

Is a linear equation, but is not a direct variation. The line not passes through the origin

case b)  y=6/x

The equation represent an inverse variation

case c) y=6x-6

Is a linear equation, but is not a direct variation. The line not passes through the origin

case d) y=6x

The equation represent a direct variation

6 0
3 years ago
-21(+5-8)7+-90:-6= yesssssssssssssssssssssssssssssssssssssssssssssssssss
hodyreva [135]

Answer:

yeeeeeeeees

Step-by-step explanation:

yeeeeeeeeeeees

8 0
3 years ago
KHAN ACADEMY! what is the constant of proportionality in the equation: y=2x?
nikitadnepr [17]

Answer:

2

Step-by-step explanation:

Compare y = 2x to y = kx, where y = kx is a proportional relationship.

We see that the constant of proportionality, k, is 2.

8 0
3 years ago
Help please!!!!!!!!!!!!
matrenka [14]

Answer:

your answer is as follows

Step-by-step explanation:

5x+20=3x+60

2x=40

x=20

(equating the slopes)

8 0
3 years ago
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