A bookstore marks up the price of a book by 40% of the cost from the publisher. Therefore, the bookstore’s price to the student, P ( x ) ( in $ ) after a 7.5% sales tax, is given by P ( x ) = 1.075 ( x + 0.40 x ) , where x is the cost of the book from the publisher. Evaluate P ( 60 ) and interpret the meaning in the context of this problem.
A bookstore marks up the price of a book by 40% of the cost from the publisher. Therefore, the bookstore’s price to the student, P ( x ) ( in $ ) after a 7.5% sales tax, is given by P ( x ) = 1.075 ( x + 0.40 x ) , where x is the cost of the book from the publisher. Evaluate P ( 60 ) and interpret the meaning in the context of this problem.
Solution Summary: The author calculates the value of P(60) and interprets it. If the bookstore's price to the student is 60, then the total price of the book including sales tax
A bookstore marks up the price of a book by 40% of the cost from the publisher. Therefore, the bookstore’s price to the student,
P
(
x
)
(
in $
)
after a 7.5% sales tax, is given by
P
(
x
)
=
1.075
(
x
+
0.40
x
)
, where x is the cost of the book from the publisher. Evaluate
P
(
60
)
and interpret the meaning in the context of this problem.
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Determine if the values of the variables listed are solutions of the system of equations.
2x - y = 4
3x+5y= - 6
x=1, y = 2; (1,-2)
Is (1, 2) a solution of the system of equations?
L
No
Yes
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10. A sound wave's amplitude can be modeled by the function y = −7 sin ((x-1) + 4). Within the interval 0 < x < 12, when does the function have an amplitude
of 4? (Select all that apply.)
9.522 seconds
4.199 seconds
0.522 seconds
1.199 seconds
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