GIVING BRAINLIEST PLEASE HELP

x = 6, AM = 22

Step-by-step explanation:

Since A is the midpoint of RM, then RA = AM = 3x + 4 , then

RM = RA + AM , substitute values

7x + 2 = 3x + 4 + 3x + 4 = 6x + 8 ( subtract 6x from both sides )

x + 2 = 8 ( subtract 2 from both sides )

x = 6

Thus

AM = 3x + 4 = 3(6) + 4 = 18 + 4 = 22

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