If x=5y-1and 3x+5=-32, what is the value of y

-2.27

Step-by-step explanation:

3x = -32 - 5

3x = - 37

x = - 12.333333333

x = 5 y - 1

substitute x value

- 12.333333 + 1 = 5 y

- 11 .333333 = 5y

- 11.333333 divided by 5 = - 2.27

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: