Starting at the same point at the same time, samuel and heather rode their bikes in the same direction. samuel traveled 3km/h faster than heather. after 3.5h samuel stopped for a half-hour break, but heather kept going. at the end of the break, heather was 8km ahead of samuel. how fast was each going?

(this is a speed, distance, time question)

Wilma worker has a $90,000 insurance policy for which she pays $1,200 a year. to compare the cash value of the policy to investing the same amount of money at 6%, she performs the following calculations:

One line passes through (-7,-4) and (5,4) . another line passes through the point (-4,6) and (6,-9)

Sam is a waiter at a local restaurant where he earns wages of $5 per hour sam figures that he also eams about $3 in tips for each person he serves sam works 6 hours on a particular day. if n represents the number of people sam serves that day, which of the following functions could sam use to figure ehis total earings for the do o a. en) = 30 o b. en) = 5n+ 18