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.

8a - 9a = -1a

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.

4a + 4a = 8a

A cylinder is a solid figure with straight parallel sides and a circular or oval cross section with a radius (r) and a height (h). The volume of a cylinder is π r²h and the surface area is 2(π r²) + 2π rh.

To multiply monomials, multiply the coefficients (the numbers that come before the variables) of each term, add the exponents of like variables, and multiply the different variables together.

(7a)(4ab) + (6a²)(5b)
(7 x 4)(a x a x b) + (6 x 5)(a² x b)
(28)(a¹⁺¹ x b) + (30)(a²b)
28a²b + 30a²b
58a²b

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.

4z - 6 > 2 - 8z
4z > 2 - 8z + 6
4z + 8z > 2 + 6
12z > 8
z > \( \frac{8}{12} \)
z > \(\frac{2}{3}\)