A chemist has 81 grams of aluminum. There are 2.70grams/millimetres for aluminum. How many milliliters of aluminum does the chemist have? Set this up either as a proportion or using unit analysis.

Solve the system of equations. y= 2x y= x^2 - 15

10% of 1,900,000. show me how you got the answer

Suppose you are an avid reader and are looking to save money on the cost of books instead of paying about $20 for each book, you decide to look into purchasing a kindle for $120 you can purchase e-books for about $5 each 1. find the slope-intercept equation for the cost of the hard copy of books using x to represent the number of books 2. find the slope-intercept equation for the cost of the kindle with cost of e-books using x to represent the number of books