1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
andreyandreev [35.5K]
3 years ago
13

Marthy has exactly five blue pens,six black pens,and four red pens in his knapsack. if he pulls out one pen at random from his k

napsack.what is the probability that the pen is either red or black?
Mathematics
1 answer:
Arte-miy333 [17]3 years ago
5 0
(red pens + black pens) / total pens
(4 + 6) / 15 = 10/15 = 2/3
You might be interested in
A helicopter travels 240 miles every 2 hours. The vehicle travels miles.
S_A_V [24]

is this the whole question because there's nothing to find?

5 0
2 years ago
Give an example of each of the following or explain why you think such a set could not exist.
Oksanka [162]

Answer:

a.No

b.No

c.No

Step-by-step explanation:

a.No,Such set does not exist .A set of natural numbers is N

Every point of this set is an isolated point but no accumulation point

Accumulation point:It is defined as that point a of set Swhich every neighborhood contains infinitely many distinct point of set

(a-\epsilon,e+\epsilon)\cap S-{a}\neq\phi

Isolated point : it is defined as that point a of set S which neighborhood   does not contain any other point of set except itself

(a-\epsilon0,a+\epsilon)\cap S-{a}=\phi

Interior point of set :Let a\in S .Then a is called interior point of set when its neighborhood is a subset of set S.

a\in(a-\epsilon,e+\epsilon)\subset S

When a set is uncountable then interior point exist it is  necessary for interior points existance .

Boundary points :Let a\in S .If every non empty neighborhood of a  intersect S and complement of S.

Every member of  a set is a boundary point

b.No, such set does not exist .A non empty set with isolated point then the set have no interior points .By definition of interior point and isolated point .For example.set of natural numbers

c.No, Such set does not exist ,for example set of natural every point is an isolated point and boundary point.By definition of  boundary point and isolated point

6 0
3 years ago
A 52 foot building casts a shadow that is 48 feet long, At the same time the shadow cast by a nearby statue 18 feet long .
8_murik_8 [283]

Answer: 14 feet

Step-by-step explanation: the difference between the shadow of the building and the building is 4 feet so the difference between the shadow of the statue and the statue is 4 feet so the answer is 14 feet.

8 0
1 year ago
Write the equation of the line with the slope of -6 passing through the point ( − 8 , 0 ).
UkoKoshka [18]

Answer:

y=-6x+48

Step-by-step explanation:

3 0
3 years ago
If g (x) = 1/x then [g (x+h) - g (x)] /h
lys-0071 [83]

Answer:

\dfrac{-1}{x(x+h)}, h\ne 0

Step-by-step explanation:

If g(x) = \dfrac{1}{x}, then g(x+h) = \dfrac{1}{x+h}. It follows that

  \begin{aligned} \\\frac{g(x+h)-g(x)}{h} &= \frac{1}{h} \cdot [g(x+h) - g(x)] \\&= \frac{1}{h} \left( \frac{1}{x+h} - \frac{1}{x} \right)\end{aligned}

Technically we are done, but some more simplification can be made. We can get a common denominator between 1/(x+h) and 1/x.

  \begin{aligned} \\\frac{g(x+h)-g(x)}{h} &= \frac{1}{h} \left( \frac{1}{x+h} - \frac{1}{x} \right)\\&=\frac{1}{h} \left(\frac{x}{x(x+h)} - \frac{x+h}{x(x+h)} \right) \\ &=\frac{1}{h} \left(\frac{x-(x+h)}{x(x+h)}\right) \\ &=\frac{1}{h} \left(\frac{x-x-h}{x(x+h)}\right) \\ &=\frac{1}{h} \left(\frac{-h}{x(x+h)}\right) \end{aligned}

Now we can cancel the h in the numerator and denominator under the assumption that h is not 0.

  = \dfrac{-1}{x(x+h)}, h\ne 0

5 0
3 years ago
Other questions:
  • Use mental math to estimate the unknown number 4210 divided by 6
    12·2 answers
  • Three perfect cube blocks of different volumes were stacked on top of each other. The top block was 64 cubic centimeters, the mi
    5·1 answer
  • A relation that shows that one expression is equal to another expression
    15·1 answer
  • Daisy is making solid spikes for her Halloween costume. The spikes are shaped like right circular cones with base radius of 2 in
    13·1 answer
  • Cual es la simplificacion de 66/81
    6·1 answer
  • A cylindrical cup and a cone both have a radius of 5 cm and a height of 8 cm. What is the approximate difference between the vol
    9·1 answer
  • if the population of a country increases by 35% every decade by what percentage does it increase by every year
    10·1 answer
  • A hot air balloon travels 18miles in 3 hours. At this rate how many miles will the hot air balloon travel in 3/4hour?
    7·1 answer
  • Please answer the following ​
    12·2 answers
  • E) What fraction is equal to 50% of<br> 1/6<br> ?
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!