PLEASE HELP ME WITH THIS!!

Mr. Palmer is late paying his rent in June.
He must pay a late fee of 5% of his monthly
rent of $850. How much must Mr. Palmer
pay in rent in June, including the late fee?

In a class, there are 12 girls. if the ratio of boys to girls is 5: 4 how many boys are there in the class

The weight v of an object on venus varies directly with its weight e on earth. a person weighing 120 lb on earth would weigh 106 lb on venus. how much would a person weighing 150 lb on earth weigh on venus?

What else equals 42 and 30 for multiply