Answer: $14.85
Step-by-step explanation:
Answer:
Step-by-step explanation:
Brittany paints the room in x hours, completing 1/x of the room per hour.
Ashley paints the room in x+2 hours, completing 1/(x+2) of the room per hour.
Working together, they complete 1/x + 1/(x+2) = ⅐ of the room per hour.
7(x+2) + 7x = x(x+2)
14x + 15 = x^2 + 2x
x^2 - 12x - 15 = 0
x = [12 ±√(12²+60)]/2= 6±√51
6-√51 is an extraneous solution.
x = 6+√51 ≈ 13.14
Brittany paints the room in 12.14 hours
Answer:
I think it’s 17 mph
Step-by-step explanation:
Answer:
Denote 3 consecutive numbers as: (n-1), n, (n+1)
=> n - 1 + n + n + 1 = 498
=> 3*n = 498
=> n = 166
=> n + 1 = 166 + 1 = 167
=> 3rd number is 167
I dont have a calculator, but 1000(1 plus .145)^12..... I guess
