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algebra

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solve for the indicated variable:

a. temperature formula
solve for F: K=5/9(F-32)+273

b. annual interest rate
solve for R: A=P+Prt

  • algebra -

    K=5/9(F-32)+273
    K-273=5/9(F-32)
    9(K-273)=5(F-32)
    9K-2457=5F-160
    9K-2457+160=5F
    (9K-2297)/5 = F

    A=P + Prt
    A-P=Prt
    (A-P)/Pt = r
    Check my work carefully.

  • algebra -

    $67×20=36 (x÷80)

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