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3 years ago

F(x)=-10x2+500x+7615

Mathematics

1 answer:

emmasim [6.3K]3 years ago

3 0

Answer:

i have no idea , try a calculator online for this subject.

Step-by-step explanation:

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What is bigger 0.65 or 3/5

kolezko [41]

.65 because 3/5 is equal to .6

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3 years ago

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Cell phone plan A costs 79 per month and comes with a free 500 phone. Cell phone plan B costs 50 per month but does not come wit

meriva

Answer: it will take 25 months

Step-by-step explanation:

Let x represent the number of months that it will take for the cost of both plans to be the same.

Cell phone Plan A costs $70 per month and comes with a free $500 phone. This means that the total cost of x months with plan A would be

70 × x = $70x

Cell phone plan B costs 50 per month but does not come with a phone. If you buy the 500 phone and choose plan B, then the total cost of x months with plan B would be

500 + 50 × x = 500 + 50x

To determine the number of months until your cost is the same as Plan A's, we would equate both costs. It becomes

70x = 500 + 50x

70x - 50x = 500

20x = 500

x = 500/20 =25

8 0

3 years ago

Suppose y varies inversely as x, and y=25 when x=3. Find x when y=15

malfutka [58]

Answer:

varies inversely as

then

XXX

⋅

for some constant

We are told when

then

XXX

⋅

XXX

⇒

and

XXX

⋅

Therefore when

XXX

⋅

XXX

→

Step-by-step explanation:

3 0

2 years ago

Henry gross pay is $4000 a month. If he saves $500 of his pay, what percent of his pay does he save?

Makovka662 [10]

Answer:

12.5%

Step-by-step explanation:

big brain

7 0

2 years ago

Suppose on a certain test, fifty students earn a perfect score and fifty students earn a zero. determine the mean grade and stan

kodGreya [7K]

Answer:

Mean=50.

standard deviation=50.

Step-by-step explanation:

Let the perfect score be 100.

The mean(average) of a data is given by: $Mean=\frac{sum of data points}{number of data points}$

Here the number of data points are 100. out of which 50 attains a value 100,and 50 attains value 0.

so, sum of data points=50×100+50×0=5000.

$Mean=\frac{5000}{100}$

Mean=50.

"Now the standard deviation of data points are calculated by firstly subtracting mean from every entry and then square the number and take it as new entry and calculate the mean of the new data entry and lastly taking the square root of this new mean".

Here if 50 is subtracted from each entry the new entry will have 50 entries as '50' and 50 entries as '-50'.

next on squaring we will have all the 100 entries as '2500'.

now the mean of these entries is: $\frac{2500\times100}{100}$

=2500

taking it's squareroot we have $\sqrt{2500}=50$

Hence, standard deviation=50.

5 0

3 years ago

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