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DiKsa [7]
3 years ago
12

Two cards are selected from a standard deck of 52 playing cards. The first is replaced before the second card is selected. Find

the probability of selecting a heart and then selecting a nine. The probability of selecting a heart and then selecting a nine is ____.
Mathematics
1 answer:
Morgarella [4.7K]3 years ago
5 0
2 cards selected from a standard 52 card deck

P(1st card is a heart) = 13/52....because there are 13 hearts in a deck of cards
the card is replaced
P(2nd card is a 9) = 4/52 which reduces to 1/13

so the probability of both events happening is : 13/52 * 1/13 = 1/52 <=     
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Slav-nsk [51]

Answer:

  y ≥ -x +2

Step-by-step explanation:

The solid line has a slope of -1 and a y-intercept of 2, so its equation in slope-intercept form is ...

  y = -x +2

The shaded area is above this line, and the line is part of the solution set, so we want an inequality that has "y" and the comparison symbol in this order: "y ≥" or "≤ y".

We already have an equation with "y" on the left, above, so we just need to introduce the comparison symbol:

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Another way to write this is ...

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4 0
3 years ago
Which equation represents the line that passes through the points (6,-3)and(-4,-9)
galina1969 [7]
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7 0
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gulaghasi [49]

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Step-by-step explanation:

3 0
2 years ago
Read 2 more answers
What is the standard form of (6x^2-8x-7)+(8x^2-76x)
Studentka2010 [4]

Answer:  14x^2 - 84x - 7

====================================================

Explanation:

The like terms 6x^2 and 8x^2 combine to 14x^2

The like terms -8x and -76x combine to -84x

Nothing pairs with the -7, so its stays as is.

Standard form is where we list the terms in decreasing exponent order. We can think of -84x as -84x^1 and the -7 as -7x^0. So 14x^2 - 84x - 7 would be the same as 14x^2 - 84x^1 - 7x^0. The exponents count down: 2,1,0.

The final answer is a trinomial since it has three terms. It is also a quadratic because the degree (highest exponent) is 2.

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3 years ago
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3 0
3 years ago
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