What are the answers 2x = 10; x=?

-3x = 21;x=?

1/3x=6; x=?

-1/2x = -7;x?

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For which of the following counts would a binomial probability model not be reasonable? a)the number of people in a classroom born in januaryb) the number of people in a classroom with red hair c) the number of people admitted to a hospital in a day with a particular disease d) the number of heart beats in a one-minute perio.

15m is what percent of 60m; 3m; 30m; 1.5 km? the last one is km not m

Hey hotel charges guests $19.75 a day to rent five video games at this rate which expression can be used to determine the charge for renting nine video games for one day at this hotel? pls