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sergiy2304 [10]
3 years ago
5

Seven less than the product of 5 and a number is 2

Mathematics
2 answers:
slava [35]3 years ago
6 0

5x-7=2

hope this makes sense

Nady [450]3 years ago
5 0
5n-7=2. For sure. Hope it’s helpful
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If you draw a card with a value of three or less from a standard deck of cards, I will pay you $43. If not, you pay me $11. (Ace
valina [46]

If W is a random variable representing your winnings from playing the game, then it has support

W=\begin{cases}43&\text{if you draw something with value at most 3}\\-11&\text{otherwise}\end{cases}

There are 52 cards in the deck. Only the 1s, 2s, and 3s fulfill the first condition, so there are 12 ways in which you can win $43. So W has PMF

P(W=w)=\begin{cases}\frac{12}{52}=\frac3{13}&\text{for }w=43\\1-\frac{12}{52}=\frac{10}{13}&\text{for }w=-11\\0&\text{otherwise}\end{cases}

You can expect to win

E[W]=\displaystyle\sum_ww\,P(W=w)=\frac{43\cdot3}{13}-\frac{11\cdot10}{13}=\boxed{\frac{19}{13}}

or about $1.46 per game.

3 0
3 years ago
Need help any body help please
lutik1710 [3]
For the first one (aka 7)  you would write 10² wich is the same as 10×10 and so the answer is 100

For the second one (aka 8) you would write 3×3×3×3×3×3×3×3×3 and the answer is 486 square miles

6 0
3 years ago
Draw 3 rows of 10 oranges.
statuscvo [17]
We cannot help you with that, sorry
8 0
3 years ago
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Please help me ): I'm in desperate need of help I'm still in Middle School and I'm so confused I don't want to get a bad grade )
lutik1710 [3]

Answer:

you can use either or for the last one

8 0
3 years ago
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Emma is saving for a bicycle that costs $300. This month, she reaches 60% of her
Ostrovityanka [42]

Answer:

180 dollars

Step-by-step explanation:

.6 = 60%

multiply = "of"= ()

.6 (300) = 180

5 0
3 years ago
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