A is directly proportional to B. When A = 12, B = 3 (a) Find a formula for A in terms of B. (b) Find the value of A when B = 5 (c) Find the value of B when A = 36
(a) A=4B, (b) A=20, (c) B=9
C is directly proportional to D. When C = 125, D = 5. (a) Find an equation for C in terms of D. (b) Find the value of C when D = 10. (c) Find the value of D when C = 75.
(a) 𝐶=25𝐷 (b) 250 (c) 3
E is directly proportional to F. When E = 2, F = 8. (a) Find an equation for E in terms of F. (b) Find the value of E when F = 30. (c) Find the value of F when E = 100.
(a) 𝐸= (1/4)𝐹 (b) 7.5 (c) 400
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