Im need HELP!!!m<JEF=40°
1 answer:
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Answer:
see explanation
Step-by-step explanation:
Given x varies directly as y then the equation relating them is
x = ky ← k is the constant of variation
To find k use the condition x = 9 when y = 4
k = =
= 2.25
x = 2.25y ← equation of variation
When y = 8, then
x = 2.25 × 8 = 18
26 to nearest year
We require the total of the sums of ages for both groups before calculating the mean for all 16
using mean =
Women
27 = ( cross- multiply )
sum = 9 × 27 = 243
Men
25 = ( cross- multiply )
sum = 7 × 25 = 175
Total sum of all 16 = 243 + 175 = 418
mean = = 26 ( to nearest year )