Answer:
19
Step-by-step explanation:
-9b -5 -7b = -309
-16b - 5 = -309
16b = 309 - 5
16b = 304
b = 304 ÷ 16
b = 19
Two planes may intersect, be parallel, or coincide .
If two planes intersect, then the set of common points is a line that lies in both planes. Two parallel planes can not intersect.
The intersection of two planes that do not coincide (if it exists) is always a line.
If an intersection of the planes does not exist, the planes are said to be parallel.
Answer:
D) 52
there is a 90 degrees angle and the one inside, it is less than 90 degrees so your answer is 52
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