Person A buys 12 granola bars and 7 cups of yogurt for 15.50 person B buys 6 granola bars and 11 cups of yogurt for 11.50

Daniel bought a computer game for $25 and later sold it to thomas for a 40% profit. how much did daniel sell the computer game for?

Sketch one cycle if the cosine function y=2cos2theta

Hell . what are the solutions to `10x^2 - 38x - 8 = 0`? is this when i find the factors and use the numbers within the factors to determine the zeros? i hope that made sense lol