The circumference of a circle is 29x inches. Find the radius. Step 2 of 3: Without substitution, solve the formula for the unknown variable in terms of the known variables.

r =

x =

Step-by-step explanation:

C = 2r

29x = 2r  --------- (i)

divide both sides of (i) by 2

r =  

but when you divide both sides of (i) by 29, you get

x =

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