A banana has 105 calories. Kalman eats 2 bananas for breakfast, after having already consumed a yogurt, which is 100 calories. Write an expression for the number of calories Kalman has eaten today.
Let x be the total number of calories Kalman has eaten today.
The expression for the number of calories Kalman has eaten today is:
100 (yogurt) + 105 (1st banana) + 105 (2nd banana) = x
= 100 + 105 + 105 = x
= 310 calories
Therefore, Kalman has eaten 310 calories today.