Which of these are accepted as a true without proof?
2 answers:
You might be interested in
<u>ANSWER: </u>
The equation is y = 1.06x, so option D is correct.
<u>EXPLANATION:</u>
Given:
Amount Catherine is paid for an MP3 player=$159.00
The price paid includes a sales tax= 6%
To find:
Equations that can be used to determine the price of the MP3 player before tax?
Solution:
Now, we know that, total cost = selling price of item + sales tax on item
y = x + 6% of x
y = x +
y = x + 0.06x
y = 1.06x
Hence, the equation is y = 1.06x, so option D is correct.
<u>QUESTION 1</u>
The given function is
If decreases by
, then the new value is
.
We need to find the value the function at which is
This simplifies to
The increment in is given by;
This simplifies to,
This further simplifies to
Therefore the corresponding increment in is
.
<u>QUESTION 2</u>
The given function is
.
If increases by
, then the new value of
is
.
The increment in is given by
We expand the brackets to get,
We simplify further to obtain,
Therefore the corresponding increment in is
.