Question

Which equations are correct?

Select each correct answer.



5x3(6x4)=30x7
4c4(3c2)=12c8
3b3(−2b4)=−6b12
5y4(2y5)=10y9

Answer 1

its c hope this helps !!!!!!

Answer 2

Answer:

D

Step-by-step explanation:

We have to find which equation is correct in give options

A.$5\times 3(6\times 4)=30\times 7$

$5\times 3(6\times 4)=5\times 6\times 3\times 4=30\times 12$

Hence, option A is wrong.

B.$4c^4(3c^2)=12c^8$

$4c^4(3c^2)=12c^{4+2)=12c^6$

When base same in multiplication then the power will be added.

Hence, option B is false.

C.$3b^3(-2b^4)=-6b^{12}$

$3b^3(-2b^4)=-6b^{3+4}=-6b^7$

Hence, option C is false.

D.$5y^4(2y^5)=10y^9$

$5y^4(2y^5)=10y^{4+5}=10y^9$

Hence, option D is  correct.