Solve the system. Give answer as (
x
,
y
,
z
)

2
x
−
2
y
+
4
z
=
0

−
6
x
−
4
y
−
4
z
=
2

−
3
x
−
8
y
+
4
z
=
1

(
x
,
y
,
z
)
=
(

,
,
)

Marco has $38.43 dollars in his checking account. his checking account is linked to his amazon music account so he can buy music. the songs he purchases cost $1.29. part 1: write an expression to describe the amount of money in his checking account in relationship to the number of songs he purchases. part 2: describe what the variable represents in this situation.

What is the answer to this question? i'm a bit stumped. also how do i do it? 5(x - 4) = 2(x + 5)

Last month, a 770 g box of cereal was sold at a grocery store for $3.10. however, this month, the cereal manufacturer launched the same cereal in a 640 g box, which is being sold at $2.50. what is the percent change in the unit price?