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Mamont248 [21]
4 years ago
10

A package of cookies contains 6 cookies. Each package of cookies costs $1.49.​ A function, f(x), is written to represent the cos

t of purchasing x packages of cookies. What is the practical domain for the function f(x)?
Mathematics
1 answer:
Ronch [10]4 years ago
4 0
You define a function f(x) which gives the cost of buying x packages of cookies. You are asked for the domain of the function. That is, what values can x take on? x is the number of packages bought.

It makes no sense to buy a negative number of packages. It also makes no sense to buy 1/2 a package or 3/4 of a package as the store won’t sell you a fraction of a package. Try going to the store and buying half a package of oreo cookies. I doubt you’ll get very far :)

So it makes sense to buy 0, 1, 2, 3, 4, ... boxes of cookies. These are whole numbers. So the domain is the set of whole numbers. You could also write the domain like this {0, 1, 2, 3, ...} making sure to use the curly brackets as those denote a set. 



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Maru [420]
Perpendicular line always have slopes that are negative reciprocals of one another.  Mathematically,

m1*m2=-1

So to be perpendicular to the line given, let's rearrange it to the point slope form of a line...

3y=6x ?3 (not sure what you wanted to type there)

anyway isolating y by dividing both side by three will leave 2x where 2 is the slope.

So for the other line to be perpendicular, m*2=-1, m=-1/2, now we have:

y=-x/2 +b, we can now you the point given to solve for b

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b=5 so

y=-x/2 +5 or more neatly

y=(10-x)/2
3 0
3 years ago
June bought ​ 3 1 2 312 ​ gallons of white paint at $17.50 per gallon and ​ 1 3 4 134 ​gallons of blue paint at $19.00 per gallo
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5 0
3 years ago
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y = sqrt(x) .... parent function

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y = sqrt(-x+2)+3 ... replace x with -x to reflect over y axis

<h3>Answer:   y = sqrt(-x+2)+3</h3>
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3. Identify a ray in the following figure.
shutvik [7]

Answer:

D- HM

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