6.) suppose x varies jointly as y and z, and x = 2.45 when y = 0.5 and z = 0.7. Find x when y = 1.2 and z = 0.9
7.) If m varies directly as n and inversely as the square of p, and m = 20 when n = 18 and p = 3. Find m when n = 8 and p = 2.
(identify the constant of variation then solve for the indicated variable in each problem).
7.) If m varies directly as n and inversely as the square of p, and m = 20 when n = 18 and p = 3. Find m when n = 8 and p = 2.
(identify the constant of variation then solve for the indicated variable in each problem).
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Step-by-step explanation:
6. x=kyz
2.45= k 0.5×0.7
2.45= k 0.35
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0.35. 0.35
7 = k
x= 7× 1.2×. 0.9
x= 7.56