Carl has 45 coins, and 18 of the coins are pennies. the rest of his coins are dimes.
which one is it?
18
27
45
63

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).

One of the same side angles of two parallel lines is 20° smaller than the other one. find the measures of these two angles.

When using the linear combination metho e linear combination method to solve a system of linear equations, the four options are: