Which ratios are equivalent to the given ratio? 15 to 30 select each correct answer. 12 7 : 15 63 4 to 2 10 : 20

7. if the value of x varies directly with the value of y, and x = 3 when y = 21. what is the valu y, and x = 3 when y = 21. what is the value of x when y = 105?

Part a: sam rented a boat at $225 for 2 days. if he rents the same boat for 5 days, he has to pay a total rent of $480. write an equation in the standard form to represent the total rent (y) that sam has to pay for renting the boat for x days. (4 points)

Ab and bc form a right angle at point b. if a= (-3,-1) and b= (4,4) what is the equation of bc?