Help plz..And No links If you don’t know the answer don’t saying anything this is important

Use the function f(x) is graphed below. the graph of the function to find, f(6). -2 -1 1 2

The marked price of an article is 25% above its selling price and the cost price is 30% less than its marked price . find the discount percent and gain percent. only a brainlest can solve it i will mark you brainlest

The value of cos 30° is the same as which of the following?