The error is in the second step they subtracted 3 from both sides but it was a 3x, which you can not do.
Correction.
9x+18+3x=1
12x+18=1
12x=-17
x=-17/12
Answer:
11.4
Step-by-step explanation:
d² = 6² + 6² - 2(6)(6)cos145
d² = 130.9789472
d = 11.44460341
Least Common Factor(LCM) of 5 and 7: 35
7*
5=35
5*
7 = 35
Factor of 5 and 7
3/7 + 3/5 = 15/35 + 21/35 = 36/35 =
Answer:
In triangle ABC one side equal
and two sides equal 
Step-by-step explanation:
We are given a prism whose base is square with sides 8 in and height 12 in.
If we take cross section through vertices A, B and C
We will get a cross section as triangle.
In triangle ABC, sides are AB, BC and AC
AB is diagonal of top square whose side 8 in.

AC is face diagonal of front face.

BC is face diagonal of right face.

AC=BC≠AB
Hence, In triangle ABC one side equal
and two side equal 