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
stira [4]
3 years ago
9

coffee worth 90 cents per pound is mixed with coffee worth 60 cents per pound ro produce a twenty pound blend worth 72 cents per

pound. How much of each type of coffe is used?
Mathematics
1 answer:
Evgesh-ka [11]3 years ago
8 0
90x+60y=72
60y=-90x+72
y=-1.5x+1.2

then create a graph using this formula.

Hope this helps!

You might be interested in
I urgently need the answer plzzzzzzz with explanation too plzzzzz
Eddi Din [679]
The pizza is fresh and the doe is fresh made
3 0
3 years ago
Read 2 more answers
Solve x2 + 6x + 7 = 0.
docker41 [41]

Answer:

x= -7/8

Step-by-step explanation:

8x + 7 = 0

8x + 7-7 = 0-7

8x=-7

8x/8x = -7/8

3 0
3 years ago
Read 2 more answers
The mean percentange of a population of people eating out at least once a week is 57℅
Sidana [21]

Answer:

<u>The correct answer is B. between 56.45% and 57.55% </u>

Complete statement and question:

The mean percentage of a population of people eating out at least once a week is 57% with a standard deviation of 3.50%. Assume that a sample size of 40 people was surveyed from the population a significant number of times. In which interval will 68% of the sample means occur?

between 55.89% and 58.11%

between 56.45% and 57.55%

between 56.54% and 57.46%

between 56.07% and 57.93%

Source: brainly.com/question/1068489

Step-by-step explanation:

1. Let's review the information given to us to answer the question correctly:

Mean percentage of a population of people eating out at least once a week  = 57%

Standard deviation = 3.5%

Sample size = 40

Confidence level = 68%

2. In which interval will 68% of the sample means occur?

For answering this question, we should find out the standard deviation of the sample, using this formula:

Standard deviation of the sample = Standard deviation of the population/√Sample size

Standard deviation of the sample = 3.5/√40

Standard deviation of the sample = 3.5/6.32

Standard deviation of the sample = 0.55

Let's recall that a confidence level of 68% means that 68% of the sample data would have a value between the mean - 1 time the standard deviation of the sample and the mean  + 1 time the standard deviation of the sample. Thus:

57 - 1 * 0.55 = 57 - 0.55 = 56.45

57 + 1  * 0.55 = 57 + 0.55 = 57.55

<u>The correct answer is B. between 56.45% and 57.55% </u>

7 0
3 years ago
Beatrice has $0.28 in her pocket, what percent of a dollar does Beatrice have?
statuscvo [17]

Answer:

28 percent

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
What is 64 x 51.64 / x?
Bumek [7]
X=. Cfhmcfhjcfhmxcbncfhmcfhncfhmcghmcfhmcfhmcfhm
3 0
3 years ago
Other questions:
  • 2miles to 3,333 yards
    9·1 answer
  • Help me I don’t understand please
    7·1 answer
  • Which expression is 3 times as large as the expression 610 – 97?
    6·1 answer
  • Find the sum and choose the correct answer.
    9·2 answers
  • Relative Frequencies and Association
    8·2 answers
  • The information below describes a data plan for a storage device.
    5·1 answer
  • 24 is 4 times as great as k.<br> I NEED A EQUATION!
    11·1 answer
  • Helppppppppppppppppppppppppppppppp
    15·2 answers
  • What is the purpose of consumer rights?
    13·1 answer
  • verron tossed a coin 20 times the results were 8 heads and 12 tails, What is the best comparison between the theoretical and exp
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!