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3 years ago

A month of the year is chosen at random. What is the probability that it has 31 days

2 answers:

6 0

How many months of the year have 31 days? Jan, Mar, May, Jul, Aug, Oct, Dec. That's 7 months out of 12. Thus, if you were to pick a month from these 12, the chances that you'd pick one that had 31 days would be 7/12, or approx. 0.58.

pogonyaev3 years ago

3 0

There are 12 months, 7/12 have 31 days. You would have a 7/12 probability of choosing one with 31 days if it is random.

You might be interested in

Given the expression-1/2(4x-6) +2 (x2-5x+5) complete the instructions below

Art [367]

Answer:

A) 2x^2 -12x +13

B) terms {2x^2, -12x, 13}; coefficients {2, -12, 13}; constants {13}

Step-by-step explanation:

A) Using the distributive property, we get ...

-2x +3 +2x^2 -10x +10

= 2x^2 -12x +13

B) Terms: {2x^2, -12x, 13}

Factors: There are no overall factors. Each term has factors ...

2x^2 has factors {2, x, x}

-12x has factors {-1, 2, 2, 3, x}

13 has factors {1, 13} (it is prime)

Coefficients: {2, -12, 13} . . . see note below

Constants: {13}

_____

<em>Additional comment</em>

We have listed the prime factors of each term, any subset can be multiplied to be a factor of the term. For example, 2·3 = 6 is a factor of -12x.

Please note that some sources do not consider a constant (13) to be a coefficient. You will need to refer to your curriculum materials to see what your author says about that.

4 0

3 years ago

Which is a greater y-intercept (0,-1) or (0,-2)

kolezko [41]

Answer:

(0,-1)

Step-by-step explanation:

-1 is less than -2 so -1 have a greater value since it is closer to the origin (0,0)

3 0

2 years ago

What are solutions for the equation y=8x-5

Semmy [17]

Answer:

Multiple

Step-by-step explanation:

You put the equation in slope intercept form, therefore, the solutions are the entire line!

Every point on the line can be considered a solution.

4 0

2 years ago

Rylee saved $9 on a $60 pair of<br> shoes. What percent did she save?

Ilia_Sergeevich [38]

Answer:

15%

Step-by-step explanation:

9/60=3/20=15%

8 0

2 years ago

A small airplane flies 1200 miles with an average speed of 300 miles per hour. 2 hours after the plane leaves, a Boeing 747 leav

inysia [295]

The small plane has the following parameters

Distance = 1200 miles

Speed = 300miles/hour

time = ?

$\begin{gathered} \text{Speed =}\frac{dis\tan ce}{time} \\ time\text{= }\frac{1200}{300} \\ \text{time = 4 hours} \end{gathered}$

If a Boeing 747 leaves 2 hours later, the total time becomes 4hours + 2 hours = 6 hours

Considering the distance of the small plane after 6 hours, we have

$\begin{gathered} \text{distance = sp}eed\times\text{ time} \\ d\text{ = 300 }\times6 \\ d\text{ =1800 miles} \end{gathered}$

So the total distance = 1800 miles

Hence the speed of the Boeing 747 will be

$\begin{gathered} \text{Speed =}\frac{dis\tan ce}{time} \\ \text{distance = 1800 miles } \\ time\text{ = 2hours} \end{gathered}$ $\begin{gathered} \text{speed = }\frac{1800}{2} \\ \text{speed = 900 miles/hour} \end{gathered}$

The average speed of the Boeing 747 is 900 miles/ hour

8 0

1 year ago