What is the solution set of this equation? i appreciate any !

Hello from MrBillDoesMath!

 -3 and 2

Discussion:

The equation to solve is:

6/m + 2 = (m+3)/(m-1)

Multiple both sides by m * (m-1).

6/m * (m*(m-1))  + 2 m (m-1) =  (m+3)/(m-1) * (m(m-1))

Simplify:

6 (m-1) + 2 m (m-1) =   (m+3)*m =>

6m -6 + 2m^2 - 2m = m^2 + 3m =>

2m^2 +4m - 6 =  m^2 + 3m.  Subtract m^2 and 3m from both sides

m^2 + m - 6 = 0. Factor this equation.

(m +3) ( m-2) = 0 so the solution  set is  -3 and 2

Thank you,

MrB

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: