Answer:
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Step-by-step explanation:
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x+3x+3x=21
7x=21
x=3
3, 9, 9=21
the answers are 3, 9, and 9
Y=4 on the first one
A=92 on the second one
=(9(1/3))^2+2+4/7
=(3^2)+2+4/7
=(9)+2+4/7
=11+4/7
=81/7
Answer:
Step-by-step explanation:
Let x be the normal body temperature
X is N(99, sigma)
Sample mean x bar = 98.2 and s = 0.63
Margin of error = Z critical * 0.63 = 1.95 *0.63 = 1.2285
It is safe since 1.5 <1.96 critical value of z at 95%
