What is 8.7 x 10 to the -6th power in standard notation?

Solve this system of equations. 12x − 18y = 27 4x − 6y = 10

Apackage of orgainc strwberries costs $1.50 while there in season and $2.25 when not in season what the percent increase

Which pair of numbers is relatively prime? a. 105 and 128 b. 130 and 273 c. 205 and 350 d. 273 and 333