Please help me with this
1 answer:
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Answer:
C. 3.33 hours
Step-by-step explanation:
Use the algebra work equation:
=
+
, where tb is the time to work together, t1 is the time it takes one person, and t2 is the time it takes the other person
Plug in the values we know:
=
+
=
+
=
20 = 6tb
3.33 = tb
So, it would take them 3.33 hours when working together.
Answer:
p = , q = 9
Step-by-step explanation:
4x² + 12x ( factor out 4 from each term )
= 4(x² + 3x)
Using the method of completing the square
add/subtract ( half the coefficient of the x- term)² to x² + 3x
= 4(x² + 2( )x +
-
)
= 4(x + )² - 4 ×
= 4(x + )² - 9