Answer:
It is 20
Step-by-step explanation:
2/3 + 3/4 = 8/12 + 9/12 = 17/12 = 1 5/12
1 + 5/12 = 12/12 + 5/12 = 17/12 = 1 5/12
2/3 + 3/4 = 1 + 5/12
448
4*2*7*8=448 different combinations
soln,
feet × feet tall
170×80
13,600