Answer:
your sister would be 35
Step-by-step explanation:
(5x²+4)–(5+5x³)
25x+4–5+125x
150x–1
Answer ran 2 3/4 miles in 1/3 of an hour
2 3/4 miles =11/4 miles in 1/3 of hour
11/4 miles divided by 1/3 hr
11/4 ÷ 1/3
11/4 * 3/1 =33/4 =8 1/4 miles in 1 hr