Answer:
t:

meaning any number can substitute t and it would be the same answer.
Answer:
7.0 < x < 7.6
X is the ideal pH of the swimming pool
Question:- Find

Answer:- we know that

so by putting the value:-

The speed of one car is 'S'. The speed of the other car is (S + 10).
In 5 hours, the first car travels (5S) miles, and the other car travels 5(S + 10) miles.
Since they're going in opposite directions, the distance between them at any time
is the sum of the distance that each one has traveled.
500 = (5S) + 5(S + 10)
500 = 5S + 5S + 50
500 = 10S + 50
Subtract 50 from each side:
450 = 10S
Divide each side by 10
S = <u>45</u>
S + 10 = <u>55</u>
You would have to multiply the top and bottom of both fractions, to get equal number between them,