Step-by-step explanation:
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5. A
6. No, 1/5(25x+15)-7x= -2x+3
-2(x-5)= -2x+10
-2x+3 is not equal to -2x+10
The square root of 141 =

This is because the two factors are 3 and 47, which both aren't perfect squares. You cannot take anything out.
If you want it simplified (like with a calculator) it would be:
C) 72.5
D) it is a acute triangle
one sentence explination) it is a acute triangle because d is not above 90 degrees. that and none of the angles are right triangles therefore eliminating the possibility of it being a right triangle
I hope this helps