Abag contains purple marbles and white marbles, 57 in total. the number of purple marbles is 3 less than 2 times the number of white marbles. hiw many purple marbles are there?

Can someone me with the property questions for 12 13 and 14 plz

The weight v of an object on venus varies directly with its weight e on earth. a person weighing 120 lb on earth would weigh 106 lb on venus. how much would a person weighing 150 lb on earth weigh on venus?

When you flip a biased coin the probability of getting a tail is 0.6. how many times would you expect to get tails if you flip the coin 320 times?