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3 years ago

How much is a 20% increase to $771?

Mathematics

2 answers:

Softa [21]3 years ago

7 0

Answer:

$925.20

Step-by-step explanation:

To get the answer for this particular problem you would do the following:

Multiply the original price (771) by the percentage that is being added. REMEMBER! Since it's a percentage, you have to turn it into a decimal by moving the decimal over two places. So, 20% would become .20. And you always multiply by the DECIMAL you just made and NOT the actual percentage.
Multiplying these two, you would get 154.20. This is the amount that is being added to the original price, so you'd have to add $154.20 to the original price of $771.
You get your answer! $771 + $154.20 gives you $925.20. So, your end price is $925.20.

And, if you were asking for how much the increase would be, then it would increase by $154.20, as said in step two.

Irina-Kira [14]3 years ago

5 0

Answer:

$154.20

Step-by-step explanation:

To find a percent of a number, multiply the percent by the number.

20% of $771 =

= 20% * $771

= 0.2 * $771

= $154.20

The increase is $154.20

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Answer:

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Step-by-step explanation:

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3 years ago

The domain and range of 5x squared plus 10x what is the domain and range of f of x equals 5x squared plus 10x

liberstina [14]

Answer:

Domain: set of all real numbers

Range: $y \geq -5$

Step-by-step explanation:

We have to find the domain and range of the function:

$f(x) =5x^2+10x$

This is a quadratic function, shape of a "U", that's called a parabola.

The domain is the set of x values for which the function is defined.

The range is the set of y values for which the function is defined.

Normally, any parabola in the form $ax^2+bx+c$ has domain as "all real numbers". This is the case for this problem as well, thus,

Domain = set of all real numbers

Now, for the range, we have to look at the minimum value of the function. So, the range would be y values greater than or equal to the minimum number. Lets find the minimum value of this function.

We have to find the value of x for which the minimum occurs by using the formula:

$x=\frac{-b}{2a} =\frac{-10}{2(5)} =-1$

Note: value of a is "5" and b is "10"

Now, we plug this into the function to find the minimum value:

$f(x)=5x^2+10x\\f(-1)=5(-1)^2 +10(-1)\\f(-1)=-5$

So, the range is set of all real numbers greater than or equal to -5.

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Step-by-step explanation:

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Step-by-step explanation:

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