Answer: The correct option is, It is a line joining the points whose x and y coordinates add up to 4.
Step-by-step explanation:
The given equation is, 
when we take x = 1 then


when we take x = 2 then


From this we conclude that the sum of 'x' and 'y' coordinates is always equal to 4.
Hence, the correct answer is, It is a line joining the points whose x and y coordinates add up to 4.
Answer:
c= 49
b=131
Step-by-step explanation:
C and 49 are vertical angles and vertical angles are equal
c = 49
b and 49 are supplementary angles since they form a straight line
b+49 = 180
b = 180-49
b = 131
Answer:
21 = 3 * 7
48 = 6 * 8 = (2 * 3) * (2 * 2 * 2) = 2^4 * 3
81 = 9 * 9 = (3 * 3) * (3 * 3) = 3^4
56 = 8 * 7 = (2 * 2 * 2) * 7 = 2^3 * 7
63 = 9 * 7 = (3 * 3) * 7 = 3^2 * 7
100 = 10 * 10 = (2 * 5) * (2 * 5) = 2^2 * 5^2
103 = 103
155 = 5 * 31