Joint and combined Variation •1-2: Find an equation of joint variation. 1. r varies jointly as p and q. r=96 when p = 6 and q = 4.
2. z varies jointly as w, x, and y, z = 24 when w= 2, x= 3, and y=8.
•3-4: Find an equation of combined variation. 3. a varies directly as b and inversely as c. a = 12 when b =4 and c=5.
4. z varies jointly as x and y and inversely as w. z = 100 when x = 5, y = 6, and w = 3.
•5-6: Find an equation of joint variation. Then solve for the missing value. 5. a varies jointly as b and c. One set of values is a = 86.4 when b= 9 and c = 12. Find a when b= 20 and c=6.5
6. m varies jointly as n and p. One set of values is m = 60 when n = 4 and p = 5. Find m when n = 12 and p= 2.
•7-8: Find an equation of combined variation. Then solve for the missing value. 7. d varies directly as e and inversely as f. One set of values is d = 10 when e = 4 and f = 2. Find d when e = 50 and f= 10.
8. z varies directly as x and inversely as y. One set of values is z = 16 when x = 32 and y = 0.4. Find z when x = 28 and y = 8.
