The ration is 170 adults:150 children, or 170/150We can factor out a 10 from both numbers, which leaves us with
17 adults/15 children.17 and 15 have no other factors, so that's the smallest ratio we can have.
This is a systems of equations.
s = stamp, e = envelope

Substitute e + 9 for s.
.1(e + 9) + .13e = 2.51
Simplify.
.1e + .9 + .13e = 2.51
Simplify.
.14e + .9 = 2.51
Subtract .9 from both sides.
.14e = 1.61
Divide both sides by .14.
e = 11.5
Now, you can input e into the other equation.
11.5 + 9 = s
Simplify.
20.5 = s
s = 20.5, e = 11.5
All you have to do is take the square root of 363=11√3
11√3-3√27
Answer:
x>-7
Step-by-step explanation:
The answer to this equation is X=-2