Hazel bought some donuts for $2.15 each. She also bought a drink for $3.12. She spent a total of $11.72. Write an equation to find how many donuts Hazel bought

How do i do this? i don’t understand

Television sizes are based on the length of the diagonal of the television's rectangular screen. so, for example, a 70-inch television is a television having a diagonal screen length of 70 inches. if a 70 inch television's diagonal forms a 29°angle with the base of the screen, what is the vertical height (1) of the screen to the nearest inch? 70 inhin

Write the point-slope form of the line passing through (2, -12) and parallel to y=3x.