99 Dollars one square foot = 9 square yards
X-13=42
x is the "variable", you're taking 13 away from that, and the answer is also given, 42.
Looking at number 4, you first have to look at the information that you have:
On tuesday he practiced for 1 5/6 hrs
Monday he practiced for 7/10 hrs
He is supposed to practice for 1 1/4 hr.
You could write questions like:
How much more did Marco practice on Tuesday than he is supposed to practice?
This works because it does indeed involve subtraction, you would be subtracting the amount that he should have practiced from the amount of time that he did practice.
If I didn't answer the question, please message me and I will clarify!
9 millimeters= 0.9 centimeters
The answer is 5/7. That is the answer :)
