Resuelve
1 . 4x= 20
2.x/7=2
3. 3x=2
4. x/2=7

Step-by-step explanation:

1. x=20/4

  x=5

2. x=2*7

x=14

3. x=2/3

4.  x=7*2

    x=14

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.

click to let others know, how is it

0.0

0 votes

1

report

read more on -

step-by-step explanation:

-1

step-by-step explanation: