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Studentka2010 [4]
3 years ago
10

Can someone explain to me

Mathematics
2 answers:
Ludmilka [50]3 years ago
5 0
Here's an example of a piecewise function that has three parts, where your choice of parts depends upon the input, x.  If you order 57 shirts, you must use the "14x + 20" part of this function, because 57>50.  Subst. 57 for x in "14x+20."  You'll get 14*57 + 20, or $818.

What's the total cost of ordering 17 shirts?  Note that 17 lies in the interval 0≤x<25.  Therefore you use ONLY the "17x+20" part of the function:

17(17)+ 20 = $309.

32 shirts:  32 is in the second interval, so evaluate "15.80x+20."
We get:  15.80(32)+20 = $525.60 (answer)
Papessa [141]3 years ago
3 0
You plug the x value into whichever function it applies to. X represents the number of shirts ordered. So for example, the first question asks the total cost if you order 57 shirts. Look at the piecewise function. If says is x>50 (or equal), you use the equation 14x + 20. 57 is greater than 50 so plug it into the equation. (14)(57) + 20 = 818. You should be able to do the rest now. If you have any more questions, you can ask.
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(17 * 93) ^ 2 = 1581
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3 years ago
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PLEASE HELP
kifflom [539]

\\ \sf\longmapsto \dfrac{x^2-1}{x^2+5x+4}\leqslant 0

  • Solving denominator

\\ \sf\longmapsto x^2+5x+4>0

\\ \sf\longmapsto x^2+4x+x+4>0

\\ \sf\longmapsto x(x+4)+1(x+4)>0

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3 years ago
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3 years ago
Consider the expressions 3x(x − 2) + 2 and 2x2 + 3x − 18.
Rzqust [24]

Answer:

See answer below

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evaluated at x= 4 we get: 26

and for x = 5 we get 47.

For the second expression

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we get the exact same values when doing the evaluation at these two points.

Based on those results, one may think the expressions may be equivalent, but they are not equivalent. Because at any other x-value, their results are different. See for example that for x = 0 the first one gives "2" while the second one gives -18.

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2 years ago
PLEASE HELP (50 Points)....
Vedmedyk [2.9K]

Total deposit = 645.30 + 645.30 = $1290.60

Total withdrawals= 158.25 +168.36+157.42+148.46 = $632.49

Balance = 398.26 + 1290.60 - 632.49 = $1056.37

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