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3 years ago

8

Emily practices piano for 2/3 of an hour on Mondays and 1/2 of an hour on Wednesdays. How many hours does Emily spend practicing

piano in one week?
A. 2/6 hour
B. 1 1/6 hours
C. 1 3/8 hours
D. 1 1/2 hours

2 answers:

geniusboy [140]3 years ago

6 0

The answer would be B

Slav-nsk [51]3 years ago

4 0

The answer to this question is B

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David made a class banner out of a large rectangular piece of paper. He cut a triangular piece out of one side. what is the area

VikaD [51]

The height would be the same as the rectangular piece of paper as well as the length so what you would do is you do heights times Lanks divide that by two and you would get the Square inches of the banner hope it helps

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2 years ago

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

(05.05)On the coordinate plane below, what is the length of AB?

JulsSmile [24]

the lenght of the picture is 14

5 0

3 years ago

Answer this question, and dnt answer it if u dnt know the answer :|

Alina [70]

Answer: 45

Step-by-step explanation:

The sides are 2x,3x,4x

Add them up and you have 9x=45

8 0

2 years ago

What’s the perimeter of a rectangle with length x and width x-5

MrMuchimi

Answer:

$P = 2(x + x - 5) = 2x - 10$

Step-by-step explanation:

Formula for the perimeter of a rectangle: $P = 3(l + L)$

7 0

3 years ago