Answer:
i'm not sure what the question is. If it is to correct the grammar given, then it would be Mario and Judith <u>a</u><u>r</u><u>e</u><u> </u>studying for <u>a</u><u>n</u><u> </u>upcoming science exam.
A
Explanation:
7 - x is subtraction
Lets say x=2
7-2 or 2 less than 7
So the answer is A
