Answer:
The number of instruments assembled in 7.5 hours are 450 n/t.
Step-by-step explanation:
The number of instruments assembled in t minutes = n
the number of instruments assembled in 1 minute = n / t
Total time = 7.5 hours = 7.5 x 60 = 450 minutes
So, the number of instruments assembled in 450 minutes are
I may not be correct, but I love fractions, and from what I know.....1/4, hope this helps! ( :
19) x=4
20) x=7
21) x=8
22) x=-7
23) x=9
24) x=5