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3 years ago

2/3(3/5x+9)=(2x+40) Algebra II

Mathematics

1 answer:

Gennadij [26K]3 years ago

8 0

Answer:

value if x is -21.25.

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Suppose a charity received a donation of $27.7 million. If this represents 31% of the charity's donated funds, what is the total

Annette [7]

Answer:

27.7 = 31%

0.89354838 = 1%

89.3548387 = 100%

89 million dollars

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3 years ago

After calculating the sample size needed to estimate a population proportion to within 0.05, you have been told that the maximum

Svetlanka [38]

Answer: 40000

Step-by-step explanation:

The formula to find the sample size is given by :-

$n=p(1-p)(\dfrac{z_{\alpha/2}}{E})^2$ , where p is the prior estimate of the population proportion.

Here we can see that the sample size is inversely proportion withe square of margin of error.

i.e. $n\ \alpha\ \dfrac{1}{E^2}$

By the equation inverse variation, we have

$n_1E_1^2=n_2E_2^2$

Given : $E_1=0.05$ $n_1=1000$

$E_2=0.025$

Then, we have

$(1000)(0.05)^2=n_2(0.025)^2\\\\\Rightarrow\ 2.5=0.000625n_2\\\\\Rightarrow\ n_2=\dfrac{2.5}{0.000625}=4000$

Hence, the sample size will now have to be 4000.

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3 years ago

The function C(x)=20x+4,000 represents the cost to produce x number of items. How many items should be produced so that the aver

NeX [460]

Answer:

More than 200 items must be produced to keep the average cost below $40 per item.

Step-by-step explanation:

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3 years ago

State of the given functions are inverses. Part 3. NO LINKS!!!!

Effectus [21]

Answer:

h(x)=-x-1

let y =-x-1

interchanging role of x & y

x=-y-1

y=-x-1

h-¹(x)=-x-1

again

f(x)=(2-3x)/2

let

y=(2-3x)/2

interchanging role of x & y

x=(2-3y)/2

2x-2=-3y

y=(2-2x)/3

f-¹(x)=(2-2x)/3

Given function are not inverse of each other.

10.

f(x)=-x+3

let y=-x+3

interchanging role of x & y

x=-y+3

y=3-x

f-¹(x)=-x+3

equal to g(x)=-x+3

Given function are inverse of each other.

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3 years ago

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Copies of a famous painting were created at the local art museum for visitors to purchase. The copies had a 20% smaller area tha

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Original painting was 39 ft²
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3 years ago