<span>sin A cos B=1/2[sin(A-B)+sin(A+B)]
sin(at)*cos(2at)=1/2[sin(3at)-sin(at)]</span>
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Answer: x = (-3,3), y = (-5,5)
Step-by-step explanation:
Add both of the equations together, for 
. Now we can divide both sides by 3, getting
. we subtract the first equation from our equation we just got, getting 
y= (5,-5). once we plug that in, we get 
, 
x = (-3,3)
Answer: The slope is 1
Step-by-step explanation:
y2-y1/x2-x1 is the equation to find slope
plug in the numbers and you get: 6-9/1-4
that equals -3/-3 which can be simplified to 1
Let x = taxable income = difference of gross income and deductions T = income tax paid = amount sent to the government Use the "filing jointly" chart on the right side. You'll use the second row of that chart since subtracting $72,380.90-$8,295.00 leads to a value between 16750 and 68000. That second row turns into this equation T=1675+0.15(x-16750<span>) w</span>here <span>16750<x≤68000</span>
