Answer:
x =27
Step-by-step explanation:
3x - 4y=65
lets substitute the value of y in the equation:
3x -4(4) =65
3x = 65 +16
3x= 81
x= 81/3
x = 27
Answer:
I believe the answer is -1 (7x-60)(x+4)
Answer: 16
Step-by-step explanation:
Answer:
99.8 %
Step-by-step explanation:
μ = 75 and σ = 5
The information about 68-95-99.7 rule is:
μ ± 0,5σ 68.3 % of all values will be in the interval
[ μ - 0,5σ ; μ + 0,5σ ] [ 72.5 : 77,5 ]
μ ± 1σ 95 % of all values will be in the interval
[ μ - 1σ ; μ + 1σ ] [ 70 : 80 ]
And:
μ ± 1,5σ 99.7 % of all values will be in the interval
[ μ - 1.5σ ; μ + 1.5σ ] [ 67,5 : 82,5 ]
And still 85 is bigger than 82,5 we can conclude that approximately 99.8 % will be smaller than 85 and then "the relative frecuency of rates less than 85 is very high 99.8 %
