The average age of 5 students is 9 years . out of them the ages of 4 students are 5,7,8 and 15 years .what is the age of the remaining students.

10 years

Step-by-step explanation:

Let the age of the remaining student be x years.

The age of the remaining student = 10 years

Step-by-step explanation:

Let the age of the remaining student = x

Average age of 5 students  = 9 year

Sum of the age of 5 students  = 9*5 = 45 years

5 + 7 + 8 + 15 + x = 45

               35 + x = 45

                        x = 45 - 35

                        x = 10

The age of the remaining student =  10 years

answer:   28.56 feet (approx)

step-by-step explanation:

since, triangle abc has measure of angle c equal to 55 degrees, measure of angle abc equal to 90 degrees, and length of bc equal to 20 feet.

we have to find out the measurement of segment ab.

therefore, tan 55° =

but bc = 20 feet.

⇒ tan 55 ° =  

⇒ ab = 20 × tan 55 °

⇒ ab = 20 × 1.42814800674

⇒ ab = 28.5629601348   ≈ 28.56 feet

step-by-step explanation:

f(gx)=f(1/x+2)

=(1/x+2)+2

=(1+2x)/2+2

=(1+2x+4)/2

= (2x+5)/2