Select all pairs of ratios that form a proportion. 2/3, 10/5
3/4, 30/40
36/30, 18/15
4/5, 28/35

Please help.

Determine the fraction of total interest owed. after the fourth month of a 12-month loan: the numerator is: {(n + ) + (n + ) + (n + ) + (n + )} = , and the denominator is: {(n) + (n + 1) + + (n + )} = . therefore, the fraction is numerator/denominator (to the nearest tenth) =

Which representation has a constant of variation of -2.5

Mrs. gehrke said cheddar weighs 16.8 pounds. he actually weighs 15.2 pounds. what is the percent error?