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4) Which step could be completed in order to prepare the system of equations below for the elimination method?

1st Equation: 5x-3y=10
2nd Equation: 8x+6y=15

A Multiply the 1st equation by -2
B Multiply the 2nd equation by 2
C Multiply the 1st equation by 2
D Multiply the 2nd equation by -2

Determine the difference: 3.2 × 1010 – 1.1 × 1010. write your answer in scientific notation.

Write 5(6x+4)-2(5x-2) in the form a(bx+c) where a, b and c integers and a> 1

Scenario: susan wants to make 2 square flags to sell at a crafts fair. the fabric she wants to buy is 3 meters wide. she doesn't want any fabric left over. what's the least amount of fabric she should buy? question: which equation will susan solve her problem? note: let x represent the length of 1 side of the flag. options: 1) 2x^2 = 4x 2) 8 +2x = 2(4x) 3) 2 * 2 = 4 * 2 4) 4x^2 -2x = 0