Which of these graphs shows line AB parallel toline Wan passing through point (2, 3)?

Can someone please answer. There is only one question. There is a picture. Thank you!

Mariulka [41]

<span>False.
Experimental probability is based on doing trials.</span>

3 0

3 years ago

Two grandparents want to pick up the mess that their granddaughter had made in her playroom. One can do it in 15 minutes working

Crank

Answer:

6 2/3 minutes

Step-by-step explanation:

Their rates in "jobs per hour" are ...

(60 min/h)/(15 min/job) = 4 jobs/h

and

(60 min/h)/(12 min/job) = 5 jobs/h

So, their combined rate is ...

(4 jobs/h) + (5 jobs/h) = 9 jobs/h

The time required (in minutes) is ...

(60 min/h)/(9 jobs/h) = (60/9) min = 6 2/3 min

Working together, it will take them 6 2/3 minutes.

5 0

3 years ago

Someone help please.

ArbitrLikvidat [17]

Answer:

9

Step-by-step explanation:

Special right triangle

this is a 45, 45, 90 triangle

Meaning that whatever the hypotenuse is

that it will be the same for x

6 0

3 years ago

M angle 3= 31°. Find m angle 4 (complementary angle)

solniwko [45]

Hi, there.

________

$\boxed{\begin{minipage}{8cm} Complementary angles \\ Complementary angles are angles whose sum \\ is 90^\circ. \text{Using this info, let's consider this:} \\ \text{If an angle's measure is 31 degrees, what's} \\ \text{its \ complement?}\end{minipage}}$

$\text{Set up an equation, letting a be the unknown angle}$

$\bold{a+31=90}\\\text{Subtract 31 from both sides}\\\bold{a=59}$

Hope the answer - and explanation - made sense,

happy studying!!

6 0

2 years ago

You pick a card at random from an ordinary deck of 52 cards. If the card is an ace, you get 9 points; if not, you lose 1 point.

Andreyy89

Answer:

$a = 9\\b = 48\\c = -1$

Step-by-step explanation:

We know that:

In a deck of 52 cards there are 4 aces.

Therefore the probability of obtaining an ace is:

P (x) = 4/52

The probability of not getting an ace is:

P ('x) = 1-4 / 52

P ('x) = 48/52

In this problem the number of aces obtained when extracting cards from the deck is a discrete random variable.

For a discrete random variable V, the expected value is defined as:

$E(V) = VP(V)$

Where V is the value that the random variable can take and P (V) is the probability that it takes that value.

We have the following equation for the expected value:

$E(V) = \frac{4}{52}(a) + \frac{b}{52}(c)$

In this problem the variable V can take the value V = 9 if an ace of the deck is obtained, with probability of 4/52, and can take the value V = -1 if an ace of the deck is not obtained, with a probability of 48 / 52

Therefore, expected value for V, the number of points obtained in the game is:

$E(V) = \frac{4}{52}(9) + \frac{48}{52}(-1)$

So:

$a = 9\\b = 48\\c = -1$

3 0

3 years ago

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