11/28, -11/4 is the point form for substitution 11/28 is x and -11/4 is y
To start, the first thing you need to know is that when you add decimals, you must line the decimal up, meaning, if you were adding 2.7+4.1, you have to make sure 2 is lined up with 4, and 7 is lined up with 1 so that the decimals align. Then, you add straight down from right to left and you get 6.8 as your answer.
Answer:
10.2 ft
Step-by-step explanation:

64 +
= 169

b=
b= 10.2469