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
What is the distance between (8, -3) and (4, -7)?<br> Choose 1 answer
Mila [183]

Answer:

Option C √32 is correct

Step-by-step explanation:

Here,

x₁ = 8

x₂ = 4

y₁ = (-3)

y₂ = (-7)

Now,

By Using Distance Formula

<em>D = √(x₂ - x₁)² + (y₂ - y₁)²</em>

<em> </em><em> </em><em> </em><em> </em>= √(4 - 8)² + [(-7) - (-3)]²

= √(-4)² + [(-7) + 3]²

= √16 + (-4)²

= √16 + 16

<u>D = √32</u>

Thus, The distance between (8, -3) and (4, -7) is √32

<u>-TheUnknown</u><u>S</u><u>cientist</u>

3 0
3 years ago
Read 2 more answers
Find the greatest number which divides 323,539 and 827 leaving remainder 35 in each case​
hammer [34]

Answer:

8

Step-by-step explanation:

8 0
3 years ago
√m/3=4<br> My teacher didn't explain how to solve these to well can someone explain?
Andrews [41]
√m/3 = 4

To remove the radical sign, square both sides.

(√m/3)² = 4²
m/3 = 16

To remove the denominator of 3, multiply both sides by 3.
3 (m/3) = 3(16)
m = 48

To check: Substitute m by its value.
√m/3 = 4
√48/3 = 4
√16 = 4
4 = 4
4 0
3 years ago
Suppose that the dollar cost of producing x radios is c(x) = 400 + 20x - 0.2x 2. Find the marginal cost when 30 radios are produ
My name is Ann [436]
C(x) = 400 + 20x - 0.2x²

c(30) = 400 + 20(30) - 0.2(30)²

= 400 + 600 - 0.2(900)
= 1000 - 180
= 820

It costs $820 when 30 radios are produced. 

Marginal cost is how much it would cost to make one MORE of the same product so now we find how much it costs to produce 31 radios and compare the two. 

c(31) = 400 + 20(31) - 0.2(31)²

= 400 + 620 - 0.2(961)
= 1020 - 192.2
= 827.8 or ≈828.

Now we find the difference which means we subtract the two. 

828 - 820 = 8. 

Your marginal cost is $8. 

To compare we can also do 29 radios. 

c(29) = 400 + 20(29) - 0.2(29)² = 811.8 or ≈812

820 - 812 = 8. 
7 0
3 years ago
A rocket is launched at t=0 seconds. Its height, in meters above sea-level, as a function of time is given by h(t)=−4.9t2+100t+3
Vikentia [17]

Answer:

see below

Step-by-step explanation:

h(t)=−4.9t2+100t+325.

The independent variable is the one that we change

t which is in seconds

The dependent variable is the result

h(t) which is in meters

4 0
3 years ago
Other questions:
  • Okay I need help on a couple so please help
    7·1 answer
  • HELP HELP<br> Which relation is a function
    5·1 answer
  • Hannah made 4 cups of gelatin dessert she divided the dessert into equal servings each serving is 2/3 cup how many serving diid
    13·1 answer
  • In an inscribed quadrilateral, angles A &amp; B are opposite angles and C &amp; D are opposite angles. The measure of angle C =
    8·1 answer
  • Oneta writes an algebraic expression with three terms. The y-term has a coefficient of -3, and the x-term has a coefficient of 1
    8·1 answer
  • Please give the coordinates to graph
    14·1 answer
  • Jessica wants to buy a new team jacket that’s cost 35$
    6·1 answer
  • Ann bought 24 bags of salad for a party. Three bags of salad serve 5 people. At that rate, how many people will 24 bags of salad
    12·1 answer
  • Margo can purchase tile at a store for $0.59 per tile and rent a tile saw for $28. At another store she can borrow the tile saw
    12·1 answer
  • Aliyah bought a car for $32,000. It is now worth $5000 less than half of what she purchased it for. To the nearest tenth of a pe
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!