X + y = 12 . . . . . . . . (1)
x - 3y = -30 . . . . . . . (2)
(1) - (2): 4y = 42
y = 10.5
$30 because you are taking away 20% of $30 and then adding back that 20%.
Answer:
1. x=60
2.x=5
3.x=8
4.x=10
Step-by-step explanation:
im assuming you want to find x value for each.
Answer:
5
Step-by-step explanation:
To solve for hypotenuse we use the Pythagorean theorem:
In this theorem:
c= hypotenuse
a = leg
b = leg
Substitute into theorem:
(square root both sides)
Therefore the hypotenuse has a length of 5.
Please say thanks if correct :)