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How could you magnify an object as much as possible with 2 lenses? Dilution of epdm compound to get liquid foam? Please help, urgent!!! 6 digit numbers are constructed from the 5 digits. how many numbers are there contain a 1 or 2 but not both? Which region of electromagnetic spectrum are each of these wavelengths near? Algebra equation:
x-2y+z=2
2x-y-z=1
Solve the following system of equations using matrices. Please help!?