Answer:
29. D
30. A
31. 15
32. -34
33. -241
34. -36
Step-by-step explanation:
Answer: 450
Step-by-step explanation:
first house--300
second house--50
third house--50 x2=100
300+50+100=450
D. 1/4
Explanation:
a perfect square is written in the form
(1)
In our problem, we have this perfect square:
(2)
with C being unknown. However, by comparing (1) and (2), we know that

So, we find

and therefore, the missing term must be

so the complete square is

Answer:
She made a mistake in Step 7.
Step-by-step explanation:
Step 1 through 6 are correct. Only from Step 6 to Step 7 the problem comes in: both sides of the equation are multiplied by x, however the x on the left side, by error, becomes 1. The correct state in Step 7 should look like this:
