Find the least common denominator (LCD).
, 
, 
A. 36x5y
B. 180x5y4
C. 90x20y12
D. 60x5y4
Answer: B
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Convert from one measure to the other.10 tons to pounds
A. 10,000 pounds B. 2000 pounds C. 160 pounds D. 20,000 pounds
Find the sum.-4 + 5
A. -1 B. -9 C. 9 D. 1
Choose the appropriate response. Perpendicular lines 
.
A. always intersect at a 45° angle B. have slopes that are negative reciprocals of each other C. have opposite slopes D. have the same slope
Solve the problem.Consider the following simplified digital photograph that has a 3 × 3 grid with four gray levels numbered from 0 to 3. It shows a letter Y in black on a light gray background.
Let A be the 3 × 3 matrix that represents this figure digitally. Find the matrix which represents the entire picture becoming one shade lighter.
A. 
B. 
C. 
D. 