So the trapezoid has 2 parallel sides making segments AD and BC transversals
Therefore making angle c and angle b add up to 180
(180-3x) + 3x + 180-9x +9x
180 +12x = 360
180= 12x
x= 15
Answer:
He should pay $2,790.7.
Step-by-step explanation:
This is a simple interest problem.
The simple interest formula is given by:

In which E is the amount of interest earned, P is the principal(the initial amount of money), I is the interest rate(yearly, as a decimal) and t is the time, in years.
After t years, the total amount of money is:

In this question:
Rate of 10%, so I = 0.1.
9 months, so 
How much should he pay for a note that will be worth $3,000 in 9 months?
We have to find P for which T = 3000. So



Then





He should pay $2,790.7.
57 = 3 * 19 so he drank 97 * 3 = 291 calories (answer)
Well, they are equivalent, but I'm not sure if that's exactly what you're asking. :)
He spends 45 on wood so that doesn't change
this is a loss so -45
then 22 for each bowl so +22 times number of bouls represented by b so
+22b
f(b)=22b-45
profit depends on number of bowls he sells