I'm sorry I can't see it clearly.
Answer:
x=2
Step-by-step explanation:
Distribute
15x-10=10+6+2x
simplify
15x-10=16+2x
subtract 2x to get x on one side
13x-10=16
add 10
13x=26
divide
x=2
Answer: $139.23
Step-by-step explanation: Take 50% of original dress price and add price of shoes. Subtract 10% of that.
Answer:
63 yards.
Step-by-step explanation:
The circumference of a circle is its diameter multiplied by the constant pi.
. We are told to use
and
, so we rearrange: 
We find that
.
Cross sections of the volume are washers or annuli with outer radii <em>x(y)</em> + 1, where
<em>y</em> = <em>x(y) </em>² - 1 ==> <em>x(y)</em> = √(<em>y</em> + 1)
and inner radii 1. The distance between the outermost edge of each shell to the axis of revolution is then 1 + √(<em>y</em> + 1), and the distance between the innermost edge of <em>R</em> on the <em>y</em>-axis to the axis of revolution is 1.
For each value of <em>y</em> in the interval [-1, 3], the corresponding cross section has an area of
<em>π</em> (1 + √(<em>y</em> + 1))² - <em>π</em> (1)² = <em>π</em> (2√(<em>y</em> + 1) + <em>y</em> + 1)
Then the volume of the solid is the integral of this area over [-1, 3]:

