Jonathan has been on a diet since january 2013. so far, he has been losing weight at a steady rate. based on monthly weigh-ins, his weight, w, can be modeled by the function w=-3m+205 where m is the number of months after january 2013
a) how much did jonathan weigh at the start of the diet?
b) how much weight has jonathan been losing each month?
c) how many month did it take jonathan to lose 45 pounds?
show work plz

Acertain standardized? test's math scores have a? bell-shaped distribution with a mean of 520 and a standard deviation of 105. complete parts? (a) through? (c)

Asquare is dilated by a scale factor of 1.25 to create a new square. how does the area of the new square compare with the area of the original square? a)the area of the new square is 1.25 times the area of the original square. b)the area of the new square is 2.50 times the area of the original square. c)the area of the new square is 1.252 times the area of the original square. d)the area of the new square is 1.253 times the area of the original square.

Two planes leave an airport at the same time, one flying east, the other flying west. the eastbound plane travels 20 mph slower. they are 1600 mi apart after 2 hr. find the speed of each plane.