Answer
7×4=28
420÷15=28
Step-by-step explanation
Expression is a mathematical statement that contain variables like a and b combined by operational signs. This sign can be ×,÷,+,-etc
A number like 28 has so many expression, for example we have;
7×4=28
420÷15=28
14+14=28
50-22=28
We can have as many expressions as possible. They are actually infinite.