Post a and post b are 120 meters apart post b and post c are 300 meters apart. ben cycled from post a to b in 15 sec and post b to post c in 55 sec. find the average speed from post a to c

In trapezoid abcd, ac is a diagonal and ∠abc≅∠acd. find ac if the lengths of the bases bc and ad are 12m and 27m respectively.

Katie wants to collect over 100 seashells. she already has 34 seashells in her collection. each day, she finds 12 more seashells on the beach. katie can use fractions of days to find seashells. write an inequality to determine the number of days, dd, it will take katie to collect over 100 seashells.

The equation of a parabola is given. y=18x2+4x+20 what are the coordinates of the focus of the parabola?