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tangare [24]
3 years ago
15

Can anyone help me with this: 4a+23-22=32 Find the value of aa'

Mathematics
2 answers:
Svetach [21]3 years ago
7 0

Answer:

We are here given,

4a+23-22 = 32

Solving (23-22):

4a+1 = 32

Now transposing (+1) to RHS:

4a = 32-1

=4a = 31

Now transposing 4 to RHS:

a = 31÷4

= a = 7.75

Thus the value of a is 7.75

sergeinik [125]3 years ago
7 0

Answer:

7.75

Step-by-step explanation:

value of a is 7.75

hope it helps you

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Answer:

y = 27.1

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as we can see by the equation, the value of y depends on the value of x.

thus, we substitute x = 12 on the previous equation:

y = 12 + 15.1

y = 27.1

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the graph of a quadratic function is shown on the grid. which function is the best represented by this graph?
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C=-2

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At a university, 60% of the 7,400 students are female. The student newspaper reports the results of a survey of a random sample
omeli [17]

Given Information:

Population mean = p  = 60% = 0.60

Population size = N = 7400

Sample size = n = 50

Required Information:

Sample mean = μ = ?

standard deviation = σ = ?

Answer:

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standard deviation = σ = 0.069

Step-by-step explanation:

We know from the central limit theorem, the sampling distribution is approximately normal as long as the expected number of successes and failures are equal or greater than 10

np ≥ 10

50*0.60 ≥ 10

30 ≥ 10 (satisfied)

n(1 - p) ≥ 10

50(1 - 0.60) ≥ 10

50(0.40) ≥ 10

20 ≥ 10  (satisfied)

The mean of the sampling distribution will be same as population mean that is

Sample mean = p = μ = 0.60

The standard deviation for this sampling distribution is given by

\sigma = \sqrt{\frac{p(1-p)}{n} }

Where p is the population mean that is proportion of female students and n is the sample size.

\sigma = \sqrt{\frac{0.60(1-0.60)}{50} }\\\\\sigma = \sqrt{\frac{0.60(0.40)}{50} }\\\\\sigma = \sqrt{\frac{0.24}{50} }\\\\\sigma = \sqrt{0.0048} }\\\\\sigma =  0.069

Therefore, the standard deviation of the sampling distribution is 0.069.

4 0
3 years ago
It takes the staff 7.2 hours to clean 27 rooms in hotel many hours would it take them to clean 15 room? srep by step​
Alinara [238K]

Answer:

4

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The staffs takes 7.2 hours to clean 27 rooms

Therefore in one hour, the number of rooms cleaned is

= 7.2/27

= 0.2666

The number of hours required to 15 rooms is

= 0.2666×15

= 4 hours

5 0
3 years ago
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