1. Four less than three times a number is greater than two times the number minus one.
2x - 5 < 3x + 7; X > -12
3x - 4 > 2x - 1; x > 3
3x + 6 > 4.5x + 3,2 > x
2x + 5 > 3x - 3; 8 > x or x < 8

answer: the correct answer is -32

step-by-step explanation:

hello,

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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