1. Write an equation for the line that passes through (10,0) and is perpendicular to y = 3x - 7 y=-1/ x - 10/3
y= 1/3x + 10/3
y=-1/3x +10
y= -1/3x + 10/3

step-by-step explanation:

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answer: 48

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b) 62.47% of the students are between 14 and 18 years old.

step-by-step explanation:

mean = 15 and standard deviation = 2

student between 14 to 18

formula used z-score

for age 14 , z score

using z-table , p(z> -0.5)=0.3085

for age 18 , z score

using z-table , p(z< 1.5)=0.9332

p(-0.5< z< 1.5)=0.9332-0.3085 = 0.6247

thus, 62.47% of the students are between 14 and 18 years old.

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