Jocy has two tanks for holding water in her property. both tanks are 50 inches tall. tank a is empty and jocy is filling the tank, for each minute jocy is filling the tank, the height of the water in tank a increased by 3.7 inches. tank b is full and jocy is draining the tank. for each minute jocy is draining the tank. the height of the water tank b decreases by 1.9 inches. approximately how many minutes will pass until the height of the water in tank a and tank b is the same?

part a

x     y

0     8

1     7.5

2     7

3     6.5

4     6

5     5.5  

for every hour i deducted .5 inches from the length of the candle

part b

it is a function because for every x value there is only one y value

part   c

for every x value there is only one y value

x       y

0       8

1       7.6

2       7.2

3       6.8

step-by-step explanation:

let x and 400 - x be the two numbers.  

==> 0.80x + 0.85(400 - x) = 400 - 68 from the statement of the problem.  

< ==> 0.80x + 0.85(400 - x) = 400 - 68  

==> 340 - 0.05x = 332  

< ==> -0.05x = -8 ==> x = 160, the first number ==> 400 - x = 240, the second number.

might be the correct answer will be question number 2