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solniwko [45]
4 years ago
15

A card is selected at random from a deck of well shuffled cards. It is replaced and another card is selected. What is the probab

ility of selecting a red card and then a black card? 1/4 1/3 1/2 1/8
Mathematics
1 answer:
Marianna [84]4 years ago
4 0

Answer:

1/4

Step-by-step explanation:

you count it as (good)/(possible)

so number of good situations is 26²

and there is 52² possible situations

so answer is 26²/52²=1/4

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Solving system of equations with substitution.
JulijaS [17]

Answer:

Hope it helps!

Step-by-step explanation:

Sub y=5x into y=2x+3

so

5x=2x+3

3x=3

x=1

plug x=1 into y=5x

y=5

Checking work

Plug (1,5) into y=2x+3

5=2(1)+3

5=5

Plug (1,5) into y=5x

5=5(1)

5=5

6 0
3 years ago
NASA is conducting an experiment to find out the fraction of people who black out at G forces greater than 6. Step 1 of 2 : Supp
Andru [333]

Answer:

The estimate of the proportion of people who pass out at more than 6 Gs is 0.279.

Step-by-step explanation:

Estimate of the proportion of people who pass out at more than 6 Gs.

Number of people who passed out divided by the size of the sample.

We have that:

Sample of 502 people, 140 passed out at G forces greater than 6. So the estimate is:

p = \frac{140}{502} = 0.279

The estimate of the proportion of people who pass out at more than 6 Gs is 0.279.

8 0
3 years ago
Victoria searched her house for quarters. She started with 17 quarters and found 6 more quarters. She then goes to the arcade. I
Viefleur [7K]

Answer:

11 games

Step-by-step explanation:

17+6=23

23/2=11.5

Victoria can play 11 games. You'd usually round up, but in this case you can't play half a game so she'll play 11 games and have one quarter leftover.

7 0
3 years ago
Read 2 more answers
Solve for x:(-771)+x=0
NeX [460]

Answer:

x=771

Step-by-step explanation:

−771 + x = 0

x − 771 = 0

x − 771 + 771 = 0 + 771

4 0
3 years ago
a laptop's screen is 8 inches long. if the diagonal measures 10 inches, what is the width of the laptop
Ray Of Light [21]
The width of the laptop is 6 inches long.
5 0
3 years ago
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