1/7 x X =1 X x 1/11=1 1 divided by 1/5=
1 answer:
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Answer:
a) y =
b) x = 4
Step-by-step explanation:
a)
3y + 2 = 20y - 5
2 = 20y - 3y - 5
2 = 17y - 5
2 + 5 = 17y
7 = 17y
y =
b) x² + 5 = 21
x² = 21 - 5
x² = 16
x = √16
x = 4
Given: Mean μ = 61.2 and standard deviation σ =21.4
The Z score of the value x=45 is given by
Z =
Z =
Z =
Z = -0.757
The z-score value for 45 rounded to nearest tenth is -0.8