Let's simplify step-by-step. 3
x
+
5
y
−
x
+
4
y
=
3
x
+
5
y
+
−
x
+
4
y
Combine Like Terms:
=
3
x
+
5
y
+
−
x
+
4
y
=
(
3
x
+
−
x
)
+
(
5
y
+
4
y
)
=
2
x
+
9
y

y > 1/3x

y < = -x + 4

hope this : )

she will travel a distance in the range of 3 - 11 miles

17

step-by-step explanation:

51/3=17

thus 17 is your answer.

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.