Can someone help please

  8.3

Step-by-step explanation:

The Pythagorean theorem helps you find AD:

  AD² +CD² = AC²

  AD = √(AC² -CD²) = √(5² -4²) = √9 = 3

The triangles in the figure are all similar, so

  BD/CD = CD/AD

  BD = CD²/AD = 4²/3 = 5.333

Then

  AB = AD +BD = 3 + 5.333

  AB = 8.333 . . . . rounds to 8.3

i'm not entirely sure

step-by-step explanation:

if you ask home depot or lowe's they might be able to you out

c.

step-by-step explanation:

substitution for (0,1)

y=x^2+4x+1

1=0^2+4(x)0+1

1=0+4(x)0+1

1=4(x)0+1

1=0+1

1=1

substitution for (-3,-2)

y=x+1

-2=-3+1

-2=-2