Bis the midpoint of ac. ab=7x-4 and bc=4x+5. find ac.
a) 51
b) 68
c) 17
d) 34

Alake near the arctic circle is covered by a 222-meter-thick sheet of ice during the cold winter months. when spring arrives, the warm air gradually melts the ice, causing its thickness to decrease at a constant rate. after 333 weeks, the sheet is only 1.251.251, point, 25 meters thick. let s(t)s(t)s, left parenthesis, t, right parenthesis denote the ice sheet's thickness sss (measured in meters) as a function of time ttt (measured in weeks).

For each proportion find the unknown number x 1/5/8=×/15

15 and 14.7 are 1 apart, so 15 – 14.7 must be 1.