Petrolyn motor oil is a combination of natural oil and synthetic oil. it contains 5 liters of natural oil for every 7 liters of synthetic oil. in order to make 672 liters of petrolyn oil, how many liters of natural oil is needed?

Kayla wants to find the width, ab, of a river. she walks along the edge of the river 65 ft and marks point c. then she walks 25 ft further and marks point d. she turns 90° and walks until her location, point a, and point c are collinear. she marks point e at this location, as shown. (a) can kayla conclude that δ and δ are similar? why or why not? (b) suppose de = 15 ft. what can kayla conclude about the width of the river?

Credit card a offers an introductory apr of 3.4% for the first three months and standard apr of 15.7% thereafter,

Write an equation of the line that passes through 9,2 and is parallel to the line y=5/3x+9