To solve this equation, repeatedly do the same thing to both sides of the equation until the variable is isolated on one side of the < sign and the answer on the other.

4c - 6 < \( \frac{c}{3} \)
3 x (4c - 6) < c
(3 x 4c) + (3 x -6) < c
12c - 18 < c
12c - 18 - c < 0
12c - c < 18
11c < 18
c < \( \frac{18}{11} \)
c < 1\(\frac{7}{11}\)

The surface area of a cylinder is 2πr² + 2πrh:

sa = 2πr² + 2πrh
sa = 2π(4²) + 2π(4 x 8)
sa = 2π(16) + 2π(32)
sa = (2 x 16)π + (2 x 32)π
sa = 32π + 64π
sa = 96π

To combine like terms, add or subtract the coefficients (the numbers that come before the variables) of terms that have the same variable raised to the same exponent.

7a⁶ + 6a⁶ = 13a⁶

Angles around a line add up to 180°. Angles around a point add up to 360°. When two lines intersect, adjacent angles are supplementary (they add up to 180°) and angles across from either other are vertical (they're equal).

To solve this equation, repeatedly do the same thing to both sides of the equation until the variable is isolated on one side of the equal sign and the answer on the other.

2y - 7 = 4 + 9y
2y = 4 + 9y + 7
2y - 9y = 4 + 7
-7y = 11
y = \( \frac{11}{-7} \)
y = -1\(\frac{4}{7}\)