Set up an equation when x is the cost of a book. If we know that 45 + 5 = 50:
45x = 50(x - .1)
Now, multiply across the parentheses:
45x = 50x - 5 (Now, combine terms over the equal sign)
-50x -50x
-5x = -5 (Now, divide off the -5 from both sides)
/-5 /-5
x = 1
This means that the current cost of a book is <em><u>$1.</u></em> This works out if you test it.
Hope this helps!
~<em>ArchimedesEleven</em>
There's 2 types of intaglio printing etching and engraving what's the primary difference between the 2
A-the artist carves the design directly in etching while in engraving its done by using acid to cut into the plate
B - the artist carves the design directly in engraving while in etching its done by using cut into the plate
C-you can feel the raised edges of the ink on an itching but not in engraving
Answer:

Step-by-step explanation:
Use the Product Rule for derivatives, which states that:
In the function we are given,
, we can break it up into two factors: -x is being multiplied by cos3x.
Now, we have the factors:
Before using the product rule, let's find the derivative of cos3x using the chain rule and the power rule.
Now let's apply the product rule to f(x) = -xcos3x.
Simplify this equation.
Multiply x and 3 together and remove the parentheses.
Therefore, this is the derivative of the function
.
Answer:
25
π
/12 radians
Step-by-step explanation:
To convert degrees to radians, multiply by π
/180
, since a full circle is
360 or 2
π radians.
Cancel the common factor of 15
Factor 15 out of 375
15
(25). π/
180 radians
Factor
15 out of 180
15. 25
⋅
π/
15
⋅
12 radians
Cancel the common factor.
15
⋅
25
⋅
π/
15
⋅
12 radians
Rewrite the expression.
25
⋅
π/
12 radians
Combine
25 and π
/12
25
π
/12 radians