Answer: It will take Susan 420 minutes to read 210 pages of her novel.
1. 90°
2. 25°
1. A straight line has an angle of 180°, and if one part of it measures 90°, then that means the other part has to measure 90°.
2. Again, a straight line measures 180°, and if one part measures 155°, the other part must measure 25° in order for the entire angle to measure 180°.
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The answer to the question
I will answer left to right row by row
row 1: 1 square unit ; 6 square units; 1 cubic unit; 6; 6 to 1
row 2: 4 square units; 24 square units; 8 cubic units; 3; 3 to 1
row 3: 9 square units; 54 square units; 27 cubic units; 2; 2 to 1
Smaller number = y
Bigger number = x
Sum of the two numbers is 180
x+ y = 180
Difference between the two numbers is 36
x - y = 36
x + y = 180 ---------------- (1)
x - y = 36 ---------------- (2)
(1) + (2):
2x = 216
x = 108
Now that we know x = 108, plug this value into equation (1) to solve for y.
x+ y = 180
108 + y = 180
y = 180 - 108
y = 72
Answer: x = 108, y = 72