Pretrolyn motor oil is a combination of natural oil and synthetic oil. It contains 2 liters of natural oil for every 3 liters of synthetic oil. In order to make 310 liters of Petrolyn oil, how many liters of synthetic oil are needed?

Find the percent of decrease from 110 to 40

Solve the application problem. find the perimeter of a ruler that measures 6 inches by 5656 inch.

What is the constant term in the expression 6x3y + 7x2 + 5x + 4

A grocer has two kinds of candies, one selling for 90 cents a pound and the other for 40 cents a pound. How many pounds of each kind must he use to make 100 pounds worth 85 cents a pound?

Andy walked aroud the perimeter of the park four times. The park is 500 by 750 feet. what is the total he walked

Write a differential equation that fits the physical description. The acceleration due to air resistance acceleration due to air resistance of a particle moving of a particle moving along a straight line along a straight line at time t is

If 12 is added to the square of a positive integer, the result is 133. Find the positive integer.

If two lines are perpendicular, which statement must be true? A. The slopes of the two lines are equal. B. The slopes of the two lines are undefined. C. The slopes of the two lines are zero. D. The slopes of the two lines are negative reciprocals.

A rectangular park is w feet wide. Its length is 25 feet larger than its width. Record using algebra: What is the length of a fence (including the gates) that was built around the park?

Less expensive and cleaner than power plants that use fossil fuels, why are they not used on a larger scale?