Question

Please help me A? B? C? D?

Answer 1

Answer:

B

Step-by-step explanation:

Answer 2

Answer:

$13x^{10}$

Step-by-step explanation:

$4x^{10}+9x^{10}$

$(4+9)x^{10}$

$13x^{10}$

Because $x^{10}$ can be factored out from both terms, you just add 9 and 4 and keep the $x^{10}$.