Greg will rent a car for the weekend. He can choose one of two plans. The first plan has an initial fee of $42 and costs an additional $0.09 per mile driven. The second plan has an initial fee of $55 and costs an additional $0.07 per mile driven. For what amount of driving do the two plans cost the same? What is the cost when the two plans host the same?

step-by-step explanation:

the original amount doesn't ''re just looking for the time it takes for 1/2 of the substance to we have

(1/2) =)     take the ln   of both sides

ln (1/2)   = )   and we can write

ln(1/2) = ) lne     and lne   = 1     so we have

ln(1/2) = -.1092t     divide both sides by -.1092

t = ln(1/2)/-.1092 = about 6.347 days = about 6.3 days (rounded)

4x and 6y

im not sure though

you can't solve x because it is 2 linear equation and you only have one equation