How many different arrangements of 7 letters can be formed if the first letter must be W or K (repeats of letters are allowed)?

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 graph of a hyperbola is shown. what are the coordinates of a vertex of the hyperbola? (0, −4) (−3, 0) (0, 0) (0, 5)

M.xyz =radians. covert this radian measure to its equivalent measure in degrees.