9:10=__30

Answer plsss
Help mee​

27

Explanation:

Let the missing number be x then

9 : 10 = x: 30

9/10 = x /30

cross multiply

10x = 9 * 30

x = 270 / 10

x = 27

30/1

9 x 30/ 10 x 1

=  270/ 10

270/10 = 27

10/10 = 1

27/1

=27

Hope it helps

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necessary and proper clause. the congress shall have power to all laws which shall be necessary and proper for carrying into execution the foregoing powers, and all other powers vested by this constitution in the government of the united states, or in any department or officer thereof.