Write two equivalent expressions to represent the area of the rectangle below.

answer:

a = 2(n-3)

a = 2n - 6

step-by-step explanation:

length = n-3

width = 2

area = length x width

let area be a

a = (n-3) x 2

a = 2(n-3) > first expression

if we continue to expand the right side of the expression:

a = 2(n-3)

a = 2(n)-2(3)

a = 2n - 6 > second expression

so then what are you asking?

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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