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
Furkat [3]
2 years ago
6

What is the definition of chemistry

Mathematics
2 answers:
amm18122 years ago
7 0
<span>Chemistry is the branch of science that deals with the identification of the substances of which matter is composed. </span>
kaheart [24]2 years ago
6 0
Chem - Chemicals istry - a science. Chemical science
You might be interested in
Problem 5.A miner is trapped inside a mine and has access to 3 doors. The first door leads to a tunneland can take him to safety
Likurg_2 [28]

Answer:

Expected time is 15 hours for him to get to safety.

Step-by-step explanation:

We define X as the time that this miner would get to safety.

We define Y as the door he chooses initially.

P(Y= 1) = P(Y=2)=P(Y=3) = 1/3

We have E[X|Y=1] = 3

E[X|Y] = 5 hours + E[X}

E[X|Y] = 7 hours + E[X]

Then we have

E[X] = 1/3(3 + 5 + E[X] + 7 + E[X])

We cross multiply

3*E[X] = (15 + 2E[x])

3E[X] - 2E[X] = 15

E[X] = 15

So the time it would take to get him to safety is 15 hours

5 0
2 years ago
2(3 – 4a) + 5(a – 7) what are the steps to solve this? please.
Doss [256]
2(3-4a) + 5(a-7) first do the distributive property
6-8a + 5a-35 now combine like terms
-41 - 3a is the final answer
7 0
3 years ago
Read 2 more answers
ou have space in your garden for 60 small flowering bulbs. Crocus bulbs cost $0.45 each and daffodil bulbs cost $0.65 each. Your
bogdanovich [222]

9514 1404 393

Answer:

  • 20 crocus
  • 40 daffodil

Step-by-step explanation:

Let d represent the number of daffodil bulbs you buy. Then 60-d is the number of crocus bulbs. The total cost will be ...

  0.45(60 -d) +0.65(d) = 35.00

  27 +0.20d = 35

  0.20d = 8 . . . . . . . . . subtract 27

  d = 40 . . . . . . . . . . multiply by 5

  60 -40 = 20 . . . . . crocus bulbs

You can buy 20 crocus bulbs and 40 daffodil bulbs for $35.

7 0
3 years ago
Consider a graph of the equation y = −3x + 4. What is the y-intercept? (5 points)
Mariana [72]

Answer:

The y-intercept would be 4

Step-by-step explanation:

7 0
3 years ago
The circle has a radius of 11 cm. What is the area of the shaded sector? Use 3.14 for π, and round your answer to the nearest te
Temka [501]
379.9 cm 2 or 253 cm 2
3 0
2 years ago
Other questions:
  • Shay makes 24 liters of homemade vegetable stock. She distributes the stock
    8·2 answers
  • What inequality is true when x=3
    9·2 answers
  • Danielle plotted 3 points from the equation y = 4x on this coordinate grid. She drew a straight line through the points. Which o
    5·2 answers
  • Answer quick for brainliest.
    8·2 answers
  • Which numbers are a distance of 4 units from 7 on the number line?
    6·1 answer
  • ASAP!! Please help me. I will not accept nonsense answers, but will mark as BRAINLIEST if you answer is correctly with solutions
    15·2 answers
  • Solve each equation by substitution
    6·2 answers
  • What is y=mx+b called?
    7·1 answer
  • A nutrition label shows that there are 154 calories in 28
    6·1 answer
  • Please fill out the questions on the right, i will do the graph
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!