The average age of the berger children is at least 15. the ages of the children are 19,14,and 12. what is the age of the fourth child

So, age of fourth child is 15

Step-by-step explanation:

Given:

Average age = 15

Age of three children = 19 , 14 , 12

To Find:

Age of fourth child = ?

Solution:

From the given data we can see that there are total four children of Berger

So

Total Children = 4

Now let the age of fourth child be x

We know that

Average

Putting in the values

15

Multiplying both sides by 4

15*4

it gives us

60 = 19+14+12+x

60 = 45 + x

subtracting 45 from both sides

60-45 = 45+x-45

15= x

or x=15

So age of fourth child is 15

alot

step-by-step explanation:

its a wood chuck that can chuck wood

the polynomial is a perfect square trinomial of the form a^2-2ab+b^2:

option a. true

step-by-step explanation:

9x^2-12x+4

comparing with the form a^2-2ab+b^2

1.) a^2=9x^2

solving for a: square root both sides of the equation:

sqrt(a^2)=sqrt(9x^2)

a=sqrt(9) sqrt(x^2)

a=3x

2.) b^2=4

solving for b: square root both sides of the equation:

sqrt(b^2)=sqrt(4)

b=2

to be a perfet square trinomial 2ab must be equal to 12x. let's check:

2ab = 2 (3x) (2)

2ab = 12x

correct