D
7•4 =28, -5•0 =0... 28+0=28
Answer:
approximately 42.05
Step-by-step explanation:
We know that the distance formula is
, so if we use (3,8) as point 2 and (21, -30) as point 1 (note that these are interchangeable), we know that
x₂=3
y₂=8
x₁=21
y₁=-30
Then, we can plug it into the formula to get 
Hypotenuse ² =(leg1)² +(leg2)²
h²=6²+8²=36+64=100
√(h²)=√(100)
h=10
Answer:
Sedimentary rocks
Step-by-step explanation:
Pretty sure this is asking for the perimeter, so just add together the length of all the sides, 30 + 30 + 18 ( 1 yard is 3 feet so just multiply that ) + 18, which equals 96 feet.
Hope this helps, if not, comment below please!!!