Answer:
x
Step-by-step explanation:
7x+18−6(x+1)−12
start out with distributive property
7x+18+(-6x)+(-6)+(-12)
then add the common things together
x+0
answer is just x, or infine answers, you could put in anything for x
Answer:

Step-by-step explanation:



Answer: 
f(-12) = -12(-12) + 100 = 144 + 100 = 244
Answer:
Q = 23
Step-by-step explanation:
Complementary angles add to 90 degrees
67+Q =90
Subtract 67 from each side
67+Q -67 = 90-67
Q = 23