Tyler tried to solve an equation step by step.
3(x + 4) = -18
3.2 + 12 = -18
Step 1
3x = -30
Step 2
x = -10
Step 3
Find Tyler's mistake.

Step-by-step explanation:

he llo :

3(x + 4) = -18

divid by 3 : x+4 = -6

x+4-4 = -6-4

x = -10

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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