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
kati45 [8]
3 years ago
9

Please help me I’ll give all my coins!

Mathematics
2 answers:
attashe74 [19]3 years ago
8 0
X = 3



-4 - 5x + 10x + 9 = 20

-4 + 5x + 9 = 20

5x + 5 = 20

5x + 5 - 5 = 20 - 5

5x = 15

5x/5 = 15/5

x=3
HACTEHA [7]3 years ago
6 0

Answer:

x=3

Step-by-step explanation:

-4-5x+10x+9=20 ] +4

-5x+10x+9=20+4 ] -9

-5x+10x=24-9

5x=15

15:5=3

x=3

You might be interested in
Determine the volume of the figure. Use 3.14 for
geniusboy [140]

Answer:

2768.6

Step-by-step explanation:

8 0
4 years ago
Read 2 more answers
A manager at a company that manufactures cell phones has noticed that the number of faulty cell phones in a production run of ce
ExtremeBDS [4]

Answer:

a) Poisson probability distribution

b) The probability of no faulty cell phones will be produced​ tomorrow is 0.1653

c) The probability of 3 or more faulty cell phones were produced in​ today's run is 0.2694

Step-by-step explanation:

Poisson distribution is used for independent events which occur at a constant rate within a given interval of time

The Poisson probability distribution formula is P(x; μ) = (e^-μ) (μ^x) / x! where

x is the actual number of successes that result from the experiment

e is approximately equal to 2.71828

μ  is the mean of the distribution

The number of faulty cell phones in a production run of cell phones is usually small and that the quality of one​ day's run seems to have no bearing on the next day

That means the probability of finding faulty phones in first day not depend on finding another days

Then the model might you use to model the number of faulty cell phones produced in one​ day is Poisson probability distribution

a) Poisson probability distribution

∵ The mean number of faulty cell phones is 1.8 per​ day

∴ μ = 1.8

∵ There is no faulty cell phones will be produced​ tomorrow

∴ x = 0

- Use the formula above to find the probability

∵ P(0 ; 1.8) = (e^-1.8) (1.8^0) / 0!

- Remember 1.8^0 = 1 and 0! = 1

∴ P(0 ; 1.8) = (e^-1.8)(1)/(1)

∴ P(0 ; 1.8) = 0.1653

b) The probability of no faulty cell phones will be produced​ tomorrow is 0.1653

∵ The mean number of faulty cell phones is 1.8 per​ day

∴ μ = 1.8

∵ There is 3 or more faulty cell phones were produced in​ today's run

∴ x ≥ 3

∵ P(x ≥ 3) = 1 - P(x = 0) - P(x = 1) - P(x = 2)

- Let us find P(1 ; 1.8) and P(2 ; 1.8)

∵ P(1 ; 1.8) = (e^-1.8) (1.8^1) / 1!

∵ 1.8^1 = 1.8

∵ 1! = 1

∴ P(1 ; 1.8) = (e^-1.8)(1.8)/(1)

∴ P(1 ; 1.8) = 0.2975

∵ P(2 ; 1.8) = (e^-1.8) (1.8^2) / 2!

∵ 1.8^2 = 3.24

∵ 2! = 2

∴ P(2 ; 1.8) = (e^-1.8)(3.24)/(2)

∴ P(2 ; 1.8) = 0.2678

Substitute them in the rule above

∵ P(x ≥ 3 ; 1.8) = 1 - 0.1653 - 0.2975 - 0.2678

∴ P(x ≥ 3 ; 1.8) = 0.2694

c) The probability of 3 or more faulty cell phones were produced in​ today's run is 0.2694

7 0
3 years ago
If you invested $1.50 every day starting when you were twelve until you were 65, how much money would you have at a 8.5% rate
podryga [215]
So first 

65-12=53yr he been saving up 

1.50*53=79.5

so he has $79.500.0
7 0
4 years ago
Solve the system using elimination<br><br> 2x+3y=14<br> x+5y=14
natali 33 [55]

Answer:

x = 4 , y = 2

Step-by-step explanation by elimination:

Solve the following system:

{2 x + 3 y = 14 | (equation 1)

x + 5 y = 14 | (equation 2)

Subtract 1/2 × (equation 1) from equation 2:

{2 x + 3 y = 14 | (equation 1)

0 x+(7 y)/2 = 7 | (equation 2)

Multiply equation 2 by 2/7:

{2 x + 3 y = 14 | (equation 1)

0 x+y = 2 | (equation 2)

Subtract 3 × (equation 2) from equation 1:

{2 x+0 y = 8 | (equation 1)

0 x+y = 2 | (equation 2)

Divide equation 1 by 2:

{x+0 y = 4 | (equation 1)

0 x+y = 2 | (equation 2)

Collect results:

Answer: {x = 4 , y = 2

4 0
3 years ago
Read 2 more answers
What is the quantity of goods and services that sellers are willing and able to sell known as?
NARA [144]

The answer would be supply

5 0
4 years ago
Read 2 more answers
Other questions:
  • 121
    11·1 answer
  • Jessica bakes 112 muffins in 7 batch. How many muffins does each batch contain?
    5·2 answers
  • The helvie family drinks 1.75 gallons of milk every 4.5 days. What is the unit rate of milk they drink per day
    11·2 answers
  • What is the slope of a line that is perpendicular to the line represented by the equation y=3/4x-1/2?
    15·1 answer
  • What is the distance between the points (3,7) and (15,16)?
    8·1 answer
  • Help!!! Thank you soooo much!!!!
    14·1 answer
  • Solve 8+3(2x+7)-5x+10
    6·1 answer
  • Q/7 + 1&gt; -5 anyone can solve this for me please
    12·1 answer
  • What is Limit of (x cubed + 3 x squared minus 5) as x approaches negative 2?
    15·2 answers
  • Christine earns 41 dollars per week working part-time at a book store. s), that Christine earns She makes one dollar more for ea
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!