Answer:
D = - 9
Step-by-step explanation:
D - 7 = -18
D - 7 + 7 = -18 + 7
D = -9
Answer:
Rectangle
Step-by-step explanation:
Count the units. For the triangle, A=0.5bh. 0.5(4)(6)=A. A=12
Now, for the rectangle, A=bh. A=(3)(5). A=15. The rectangle is larger
The first digit may be 1 or 8.
The second digit may be 1, 2, 4, 8.
The third digit may be 1, 3, 5, 7, 9.
There are 
The probability that this is the correct code is 
(n^-3)^6=n^-18=1/n^18
the answer is D