A 816-mile, 7-hour plane trip was flown at two speeds. For the first part of the trip, average speed was 111 mph. For the remainder of the trip, the average speed was 124 mph. How long did the plane fly at each speed?

4 hours at 126 mi/hr

t = time flying at 111 mi/hr

837 = 111t + 126*(7-t)

837 = 111t + 882-126t

-45 = -15t

t = 3 hours at 111 mi/hr

the answer is b. 60. each interior angle in 120, so the exterior angle must be 60 in order to add up to 180

step-by-step explanation:

well we know there are 4 clubs in 52 cards so it’s replaced so it should be 3/51

step-by-step explanation: