Question 1209849
To find the value of 'c', we need more information about the relationship between a, b, and c. Here are a few possibilities:

* **If a, b, and c represent the sides of a right triangle:**
    * If a and b are the legs, then c (the hypotenuse) can be found using the Pythagorean theorem: a² + b² = c²
        * 30² + 40² = c²
        * 900 + 1600 = c²
        * 2500 = c²
        * c = √2500
        * c = 50
    * It is also possible that b is the hypotenuse, and we are solving for a leg c. In this case, b²-a² = c²
        * 40²-30²=c²
        * 1600-900=c²
        * 700=c²
        * c=√700, or approximately 26.46.
* **If a, b, and c are part of a simple arithmetic sequence:**
    * The difference between b and a is 40 - 30 = 10.
    * Therefore, c could be 40 + 10 = 50.
* **If a, b, and c are part of a simple arithmetic pattern:**
    * There are infinite possiblities.
* **Without more context, c could be any number.**

Therefore, the most likely solution, assuming a right triangle with a and b as legs, is c = 50.