1) b (think commutative and associative properties) , 2) a (think that minus a negative equals positive)
Answer:
57.4
Step-by-step explanation:
25 because x times y is 10 and you multiply x times y 2 times then you add 5
Answer:
6 7/8 inches
Step-by-step explanation:
The first thing to do is to get the measurements in either inches or feet. You can't have both. Let's go from feet to inches.
3 feet = 36 inches
13.75 feet = 165 inches
Now we can set up a proportion to solve for the number of inches the model is:

Now we can cross multiply:
36x = 247.5 so
x = 6.875 or 6 7/8 inches