The answer is C.
x=2
y=-30
(2;-30)
A isn’t correct because there is 2 O’s on the left side and 3 on the right
B is incorrect because there is an S on the right but not on the left
C is incorrect because there are 2 Ca on the left side and 1 on the right
D is balanced as there are 2Na ok each side, 2Cl on each side,2H, and 1 SO4 on each side
<span>Simplifying
5(6 + -4x) = 25
(6 * 5 + -4x * 5) = 25
(30 + -20x) = 25
Solving
30 + -20x = 25
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '-30' to each side of the equation.
30 + -30 + -20x = 25 + -30
Combine like terms: 30 + -30 = 0
0 + -20x = 25 + -30
-20x = 25 + -30
Combine like terms: 25 + -30 = -5
-20x = -5
Divide each side by '-20'.
x = 0.25</span>
This is worded horribly, please reword and i will definitely help
Circumference of a circle = 2π r
2*3.14*13 = 81.64 = 81.6
