Since p = x² - 7, you can substitute/plug in p for x² - 7
So:
(x² - 7)² - 4x² + 28 = 5
(p)² - 4x² + 28 = 5 You can factor out -4 from (-4x² + 28)
p² - 4(x² - 7) = 5 Plug in p
p² - 4p = 5 Subtract 5
p² - 4p - 5 = 0 Your answer is C
Answer:
8 hours
Step-by-step explanation:
14 + 3x =38
-14 -14
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3x = 24
---- ----
3 3
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x = 8
12:32 is simply 3:8 but divided by 4 to both sides.
Answer:
x=65
Step-by-step explanation:
145=2x+15
