Round each number to the nearest whole number to estimate the sum: \( 1\frac{2}{7} + 3\frac{7}{9} + \frac{2}{3} \). Show what you rounded to before you added. HELP PLSSS WILL GIVE BRAINLIESTTT

Adriano loves anime and collects toys from his favorite series.each month he gains 4 toys. if adriano has 3 toys when he starts collecting, how many does he have after 4 months

On a string instrument, the length of a string varies inversely as the frequency of its vibrations. an 11-inch string has a frequency of 400 cylces per second. find the frequency of a 10-icnch string.

Which expression is rational? 6. , square root two, square root 14, square root 49