Solve 821*54 using a area model

Mathematics and science and spelling

Petrolyn motor oil is a combination of natural oil and synthetic oil. It contains 5 liters of natural oil for every 3 liters of synthetic oil. If 255 liters of natural oil are used, how many liters of Petrolyn oil will be made?

Which expression is equal to 9/√45? A. 3√3 / 5 B. 3√5 / 5 C. √5 D. 3√3

A rectangular plot of land is represented on a coordinate plane where each unit is one foot. The vertices are at (60,30), (60,90), (100,30), (100,90) ? A. 100 feet B. 200 feet C. 560 D. 2,400

During a sale, a shirt was marked down from $70 to $56. What was the percent decrease?

What is the ratio of 22/80

Which of the following fractions is equivalent to 3/8? a. 6/14 b. 9/24 c. 4/9 d. 15/35

A dive ring on the bottom of the pool is 10 feet below the surface of the water. Sabine dives down and brings the ring back to the surface. What integer represents the dive ring's final position with respect to the surface of the water?

How to solve - 5x=9-2x

Why is there no set path that I've scientific inquiry must follow