A book costs $45. Sales tax on the book is 7% which expression represents the final cost of the book in dollars
2 answers:
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Answer:
The function is defined when x > 0
Step-by-step explanation:
Functions with radicals are only undefined when the value in the radical is negative, because the root of a negative number is imaginary.
We know the function is undefined when the denominator is equal to zero. is equal to zero when x=0.
We also know that functions with radicals are undefined when the value in the radicals are negative, because the root of a negative number is imaginary. . will always be positive, but
is negative when x < 0.
So the function is undefined when x = 0, and when x < 0.
Therefore it is defined when x > 0
Answer:
1) The length of is 20.
2) The length of is 17.
Step-by-step explanation:
1) If and
, then we can use the following proportionality ratio:
(1)
Where is the length of segment
.
If , then the value of
is:
The length of is 20.
2) If and
, then we can use the following proportionality ratio:
(2)
Where is the length of segment
.
If , then the value of
is:
The length of is 17.