Indicate which property is illustrated in step 1. step 1 9x + 5 + 2x + 3 = (9x + 5) + (2x + 3) step 2 = 9x + (5 + 2x) + 3 step 3 = 9x + (2x + 5) + 3 step 4 = (9x + 2x) + (5 + 3) step 5 = (9 + 2)x + (5 + 3) step 6 = 11x + 8

step-by-step explanation:

when the line is solid:

when the line is dashed:

this > inequality sign means:

this < inequality sign means:

this > inequality sign means:

this < inequality sign means:

about the problem:

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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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step-by-step explanation:

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