Adding, Subtracting, and Multiplying Monomials

-20x⁶ + (-10x⁶)

• 10x¹²

• -30x⁶

• -10x⁶

• -30x¹²

Find the sum of 16y² and -5y².

• -11y²

• 21y²

• 11y²

• 16y² - 5y²

Subtract 9a from -16a.

• -25a

• -7a

• 25a

• 7a

10m²n + 7mn² - m²n

• 9m²n + 7mn²

• 16m²n

• 17m²n - mn²

• No change

-20x⁶ + (-10x⁶)

• 10x¹²

• -30x⁶

• -10x⁶

• -30x¹²

Multiply (6m³n³ )(8m²n³)

• 48m⁵n⁹

• 48m⁶n⁶

• 48m⁵n⁶

• none of the above

(-4a)(3abc)

• -12abc

• -12bc

• -4a²bc

• -12a²bc

Simplify
(2a²b⁴z)(6a³b²z⁵)

• 8a⁵b⁶z⁶

• 12a⁶b⁸z⁵

• 12a⁵b⁶z⁶

• 8a⁶b⁸z⁵

(2y²)(4xy³)+(3xy⁴)(5y)

• 23x²y¹⁰

• 120xy⁵

• 120x²y¹⁰

• 23xy⁵

2(c - 8)

• 2c - 16

• 2c + 16

• 2c - 8

• c - 16