- How can i find the equivalence classes if x-y divsible by 4 is an equivalence relation?

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How many milliliters of a stock solution of 12.0 M HNO3 would you have to use to prepare 0.500 L of 0.200 M HNO3? The least common multiple of 2 numbers is 60. One of the numbers is 7 less than the other. What are the numbers? Suppose that A ⊆ B ⊆ V .
(a) Prove that span(A) ⊆ span(B).
(b) Prove that if B is linearly independent then A is linearly independent.? What is the purpose of DNA? (25^x)/(125^-3x) = 625^2x-3 how do you solve for x?