- To visit an exhibition at the ArtScience Museum, 6 adults and 4 senior citizens have to pay $228 while
13 adults and 7 senior citizens have to pay $459.
(1) By letting $x be the entrance fee for an adult
and $y be the entrance fee for a senior citizen,
formulate a pair of linear equations.
(ii) Hence, find the entrance fee for an adult and
for a senior citizen.

CAN SOME ONE HELP ME​

Draw the line of reflection that reflects △abc onto triangle δ a'b'c'

Polygon abcde is reflected to produce polygon a′b′c′d′e′. what is the equation for the line of reflection?

An automobile assembly line operation has a scheduled mean completion time, μ, of 12 minutes. the standard deviation of completion times is 1.6 minutes. it is claimed that, under new management, the mean completion time has decreased. to test this claim, a random sample of 33 completion times under new management was taken. the sample had a mean of 11.2 minutes. assume that the population is normally distributed. can we support, at the 0.05 level of significance, the claim that the mean completion time has decreased under new management? assume that the standard deviation of completion times has not changed.