Final answer:
To find the total number of words Alex and Maria will type together in 15 minutes, we calculate the number of words each will type individually and then add them together.
Step-by-step explanation:
To find the total number of words Alex and Maria will type together, we need to calculate the number of words each will type in 15 minutes and then add them together.
Since Alex can type 40 words per minute, he will type 40 * 15 = 600 words in 15 minutes.
Similarly, Maria can type 50 words per minute, so she will type 50 * 15 = 750 words in 15 minutes.
To find the total number of words they will type together, we add these two amounts: 600 + 750 = 1350 words.