Where does the line y = -4x + 9 cross the y-axis? at y = -4
at x = -4
at x = 9
at y = 9

Do you need with the x value for the minimum? its always between the two intercepts for a parabola

Hello! i hope this
since the cosine is the ratio of the adjacent side to the hypotenuse, you can see that cos 60° = ½. answer. according to the property of cofunctions (topic 3), sin 30° is equal to cos 60°. sin 30° = ½.

Ineed on quadratic equations to solve problems