An experienced roofer can roof a house in 26 hours. A begin- ning roofer needs 39 hours to complete the same job. Find
how long it takes for the two to do the job together.

yes because there is exactly one y value for every x value

for function there can't be more than one value for every x value

4.

step-by-step explanation:

it have the same area.brainliest

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