Mr. rosenberger asked his students to use the distributive property to rewrite the expression 18(24) by using friendlier numbers.
the table below shows the expressions that four students created.
expressions created by students
student
expression
aaron
10+8x4+20
brian
10+8(4+20)
cece
18(4+6)
diana
18(4+20)
which student's expression is equivalent to 18(24)?
aaron
brian
cece
diana

Step-by-step explanation:

We know that 18(24) = 432. So the student that deduct this answer is the correct one.

From the table, we can observe that Diana did the best rewrite process, because it's equal to 18(24), her expression is 18(20+4), which it's a rewrite using distributive property which was ask. Other students didn't use the property correctly.

Therefore, Diana shows the right use of the property, and her expression is equivalent.

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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step-by-step explanation: