solve for the indicated variable:

Question

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

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

Answer 1

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.

Answer 2

$67×20=36 (x÷80)

Answer 3

K = C + 273, for C whats the answer

Answer 4

THIS APP SUCKS :,/

Answer 5

C=k-273. Am i correct