Answer:
x2 - 4x - 21
Step-by-step explanation:
Area = (x -7 )(x +3)
= x*x - 7*x + x*3 - 7*3
=x2 - 4x - 21
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Answer:
1/20
there are 20 students altogether
Step-by-step explanation:
um I'm not sure
The formula is x1+x2 divided by 2 and y1+y2 divided by 2.I hope this is what you where looking for
252 you multiply the 42 and 12 then devoid even by 2
