Write a system of equations to describe the situation below, solve using elimination, and fill in the blanks. Noah is building bookshelves to sell at a furniture store. First, he built 3 small bookshelves and 8 large bookshelves, using a total of 497 nails. Later, he built 3 small bookshelves and 4 large bookshelves, using a total of 301 nails. How many nails does Noah use to build the shelves?

Noah uses
nails to make each small bookshelf and
nails to make each large one.

The blue whale is the largest animal living on the earth. the average blue whale measures 100 feet long (30 meters) and weighs 300,000 pounds (136,000 kilograms). a whale’s head is 1⁄3 of the length of its body. a new baby whale is 1⁄4 the length of a grown whale. the average man is 1⁄17 the length of a blue whale, and 1⁄1,818 its weight. a human baby measures 1⁄4 of the length of an adult. calculate the following information: how long is a whale’s head? how long is a new baby whale? how tall is the average man? how much does the average man weigh? how tall is the average human baby?

If, while training for a marathon, you ran 60 miles in 2/3 months, how many miles did you run each month? (assume you ran the same amount each month) write your answer as a whole number, proper fraction, or mixed number in simplest form. you ran __ miles each month.

Abacteria population is tripling every hour. by what factor does the population change in 1/2 hour? select all that apply