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Vikentia [17]
3 years ago
9

A bag contains 4 red marbles and 5 blue marbles. What is the probability of randomly selecting a blue marble and then, without r

eplacing it, selecting a red marbleA bag contains 4 red marbles and 5 blue marbles. What is the probability of randomly selecting a blue marble and then, without replacing it, selecting a red marble

Mathematics
2 answers:
solniwko [45]3 years ago
7 0

R means red marbles, B means blue marbles. Wish you can understand the meaning of this picture!( ̄︶ ̄)

irga5000 [103]3 years ago
3 0

Answer: \frac{5}{18}

<u>Step-by-step explanation:</u>

P(blue) = 5 blue out of 9 total = \frac{5}{9}

P(red) = 4 red out of 8 remaining = \frac{4}{8} = \frac{1}{2}  <em>simplified</em>

P(blue)    and     P(red)

      \frac{5}{9}      x        \frac{1}{2}

= \frac{5}{18}                    

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Choose the system of equations which matches the following graph: (5 points)
Triss [41]

Answer:

-5x + y = -7

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Step-by-step explanation:

Equation of the line that slants upwards from left to your right:

The slope (m) = rise/run = (5/1) = 5

Using a point on the line, (2, 3) and the slope, substitute x = 2, y = 3, and m = 5 into y = mx + b to find the value of b.

Thus:

3 = 5(2) + b

3 = 10 + b

3 - 10 = b

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Substitute m = 5 and b = -7 into y = mx + b

First equation of the system would be:

y = 5x - 7

Rewrite, you'd have:

-5x + y = -7

Equation of the line that slants downwards from left to your right:

Slope (m) = rise/run = -(2/1) = -2

y-intercept, b = 0 (the point where the line intercepts the y-axis)

Substitute m = -2 and b = 0 into y = mx + b.

y = -2x + 0

Rewrite, you'd have:

2x + y = 0

✔️The equations of the system are:

-5x + y = -7

2x + y = 0

4 0
2 years ago
Can someone help me please<br> b-1/4=8 1/2
babunello [35]

Answer:

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4 0
2 years ago
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tankabanditka [31]

Answer:

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