Answer:
B) 12
Step-by-step explanation:
Opposite sides are congruent
Answer:
x = 15
Step-by-step explanation:
x + 2x - 2 + 2x - 2 = 71
Solve for x, you get 15.
R = x(A+B)
distribute
R=Ax+Bx
subtract Ax from each side
R-Ax=Bx
divideby x
(R-Ax)/x =B
Choice C
9514 1404 393
Answer:
C, D
Step-by-step explanation:
The applicable rules of exponents are ...
(a^b)(a^c) = a^(b+c)
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The correct equations are the last two.
For the first two, the appropriate products are ...

Answer:
90-51 = 39 39°
Step-by-step explanation: