Question

Help plz I'm desperate ​

Answer 1

Anna:

1st month = 18 + $\frac{3}{4}$ = 18$\frac{3}{4}$ inches

2nd month = 18$\frac{3}{4}$ + $\frac{3}{4}$ = 19$\frac{1}{2}$

3rd month = 19$\frac{1}{2}$ + $\frac{3}{4}$ = 20$\frac{1}{4}$

4th month = 20$\frac{1}{4}$ + $\frac{3}{4}$ = 21

5th month = 21 + $\frac{3}{4}$ = 21$\frac{3}{4}$

Grace:

Because Anna is $\frac{9}{4}$ inches shorter than Grace, we can start the count from the third month:

1st month = 20$\frac{1}{4}$

2nd month = 21

3rd month = 21$\frac{3}{4}$

4th month = 21$\frac{3}{4}$ + $\frac{3}{4}$ = 22$\frac{1}{2}$

5th month = 22$\frac{1}{2}$ + $\frac{3}{4}$ = 23