Answer:
3/4 of a foot will cost $2.25.
Step-by-step explanation:
This question is solved by rule of three, due to proportions.
One foot of lace costs 3 dollars. How much is 3/4 of a foot going to cost?
1 foot - 3 dollars
3/4 foot - x dollars

So
3/4 of a foot will cost $2.25.
Answer:
this makes no sense at all, what's the question?
cos(3x) = cos(2x+x)
= cos(2x) cos (x) -sin(2x)sin(x)








B.90 because 90 degrees is above the original angel
2-1, 3-2, 4-3, 1*1, 1/7, any number of expressions fit the bill here.