It is already in identity.
cos (x - y) - cos (x + y) = 2 sin(x) sin (y)
3/1200 = 1/400 = 25/10000 = 0.0025
You start with: (assuming x equals the cost to enter and y the cost of going on the rollercoasters.)
x+5y=35
x+11y=59. Multiply the top equation by -1, and subtract the equations, giving you -6y=-24, divide by -6 into both sides of the equation, to get y=4. Now replace y in one of the original equations (I recommend x+5y=35) and solve for x, giving you x=15
The cost for entering is 15 dollars, while each coaster is 4 dollars more. You could simplify this by changing y into x and making it slope-intercept form, to track your cost. y=4x+15, so it has a slope of 4, and a y-intercept of 15. This answer should give you a good grade on a test.
<h3>Answer:</h3><h3>14/2=t/7</h3><h3>7=t//7</h3><h3>14=t</h3>
