Nếu X là nửa nhóm giao hoán thì (a ∗ b) ∗ (c ∗ d) = (a ∗ d) ∗ (c ∗ b) với mọi a, b,c, d ∈ X.

Which graph represents the same relation is the sa which graph represents the same relation as the set {(-3-2)}

Lana's family entered a 5-kilometer race lana's average step length is about 0.5 meter how many steps will she need to take the finish

The temperature of a chemical solution is originally 21 ? c . a chemist heats the solution at a constant rate, and the temperature of the solution 75 ? c after 1212 12 minutes of heating. the temperature, tt t , of the solution in ? c is a function of x , the heating time in minutes. write the function's formula.