Which of these strategies would eliminate a variable in the system of equations?

2x + 8y = -3

3x + 6y = -4

a: multiply the top equation by 333, multiply the bottom equation by -2−2minus, 2, then add the equations.

b: multiply the top equation by 333, multiply the bottom equation by 444, then subtract the bottom equation from the top equation.

c: multiply the top equation by -4−4minus, 4, multiply the bottom equation by 333, then add the equations.

Complex numbers multiply √-4 * √-25 and show all intermediate steps. alternative notation is sqrt(-4) * sqrt(-25).

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

Francisco's credit card has an apr of 28.98%, calculated on the previous monthly balance. his credit card record for the last 7 months is shown in the table below francisco is trying to figure out what this all means. answer the following questions: what is the total amount that francisco has paid in interest over the 7 months? what is the total amount that francisco has made in payments over the 7 months? how much of francisco's payments have gone to paying down the principal on his account? what is francisco's new balance at the end of month 8? what will francisco be charged for interest for month 8?