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Vinvika [58]
3 years ago
10

What is the opposite integer of –(–7)?

Mathematics
1 answer:
klio [65]3 years ago
7 0
-7

-(-7) is 7 because two negative signs result in a positive. The opposite integer of 7 is -7
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Consider a game in which players draw playing cards one at a time from a standard 52-card deck. If a player draws a face card (a
aev [14]

Answer:

Expected value of drawing a card in this game on the first turn = 6

Step-by-step explanation:

Given - Consider a game in which players draw playing cards one at a time from a standard 52-card deck. If a player draws a face card (a jack, a queen, or a king), the player is awarded 16 points. Any other card drawn earns the player 3 points.

To find -  What is the expected value of drawing a card in this game on the first turn?

Formula used -

Expected value, E[x] = ∑ x p(x)

where p(x) is the probability

Proof -

Total cards in a standard deck = 52

Total face cards = 12 (a jack, a queen, or a king)

Other cards = 40

Now,

Probability of getting a face card = \frac{12}{52}

Probability of getting a other card = \frac{40}{52}

So,

Expected value, E[x] = ∑ x p(x)

                                  = (16)(\frac{12}{52}) + (3)(\frac{40}{52})

                                  = \frac{192}{52} + \frac{120}{52}

                                  = \frac{312}{52}

                                  = 6

∴ we get

Expected value of drawing a card in this game on the first turn = 6

So,

The correct option is - B. 6 points

4 0
3 years ago
In early spring, you buy 6 potted tomato plants for your container garden. The plants contained in 8 inch pots sell for $5 and t
prohojiy [21]
X - the number of plants in 8 in pots
y - the number of plants in 10 in pots

x+y=6\\
5x+8y=36\\\\
x=6-y\\
5x+8y=36\\
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y=2\\\\
x+2=6\\
x=4

4 plants in 8 in pots and 2 in 10 in pots.

3 0
3 years ago
Is the first side “SW=XW” or “ST=XU”?
olya-2409 [2.1K]

Answer:

SW =XW and ST=XU and UW=TW

Step-by-step explanation:

All are true and correct since the two triangles are congruent

5 0
3 years ago
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Well in my calculations I got: well if you he increases the speed by 2.6 per hour soo 4+2.6=6.6
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About your photograph 4 in wide and 6in long the photograph is enlarged and their larger is proportional to the original photogr
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18 inches.

12/4=3 so you would multiply 6•3 to get 18
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