A is the point with coordinates (4,6) b is the point with coordinates (d,21)
the graident of line AB is 3
what is the value of d

Aboat costs 19200 and decreases in value by 12% per year. how much will it cost in 5 years

Juliana says that she can use the patterns of equivalent ratios in the multiplication table below to write an infinite number of ratios that are equivalent to 6: 10. which statement explains whether juliana is correct? she is correct because she can multiply 6 and 10 by any number to form an equivalent ratio. she is correct because 6: 10 can be written as 1: 2 and there are an infinite number of ratios for 1: 2. she is not correct because the multiplication table does not include multiples of 10. she is not correct because 6: 10 is equivalent to 3: 5 and there are only 9 ratios in the multiplication table that are equivalent to 3: 5.

How do i simply this expression (quadratic formula basis) on a ti-84 or normal calculator?