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2 years ago

Find the domain of the function. Write your answer in interval notation. f(x)=-4x² + 5x +1

Mathematics

1 answer:

nirvana33 [79]2 years ago

6 0

Answer:

All real numbers

(-∞, ∞)

Step-by-step explanation:

Domain is the set of x-values that can be inputted into function f(x).

We see here that our function is a parabola. We also see that we can plug in any number x and we would get an output y. Therefore, our domain is all real numbers:

(-∞, ∞)

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Describe the difference between the calculation of population standard deviation and that of sample standard deviation.

taurus [48]

Answer:

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Step-by-step explanation:

The population refers to the whole set under study, while the sample is a representative part of that population.

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2 years ago

A road has a 16.7% grade. Why might we want to warn drivers of a grade like this?

never [62]

The higher the percentage, the steeper the grade and the steeper the hill. This warning is issued so drivers are more careful (otherwise they would probably get into more accidents).

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2 years ago

Suppose the CPI increases this year from 208 to 221. What is the rate of inflation for this year? Round your answer to the neare

guajiro [1.7K]

SOLUTION:

We are to find the rate of inflation in the given question;

The formula to be used is;

Inflation rate =

$\frac{\text{CPI}_{present}-CPI_{previous}}{CPI_{previous}_{}}\text{ X 100}$ $\begin{gathered} \frac{221-208}{208}\text{ X }\frac{100}{1} \\ \\ \frac{13}{208}X\frac{100}{1} \\ \\ 6.25\text{ \%} \\ 6.3\text{ \% (nearest tenth of a percentage)} \end{gathered}$

CONCLUSION

The inflation rate of CPI that increased from 208 to 221 to the nearest tenth of a percentage is 6.3%.

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1 year ago

The value of y varies directly with the value of x. When y = 15, x = 3. What is the value of x when y = 60?

Viefleur [7K]

The answer is B
because at first y was equal to 15 and x equaled to 3 the quotient of 15/3 = 5.
now the y is 60 so, 60/5 = 12

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2 years ago

Solve the inequality, round to the nearest tenths

White raven [17]

Answer: x ≥ 10.833333

Step-by-step explanation:

4 0

2 years ago

Read 2 more answers