2(2x + 1) = 4x + 2
4x + 2 = 4x + 2
All real numbers are solutions :)
Answer:
He climbed 19 steps
Step-by-step explanation:
Let steps climbed in 9.5 seconds = z
If 24 steps = 12 seconds
then: z = 9.5 seconds
Using criss cross method
24 x 9.5 = 12 x z
228 = 12 z
z = 228/12
z = 19 steps
0.03
Step-by-step explanation:
S ∝ t, introduce constant, if value of S depends on t only. Let that constant be 'k'.
=> S = kt
When, S = 0.6 & t = 4:
Answer
=> 0.6 = k(4)
=> 0.6/4 = k
=> 0.15 = k
Therefore, when t = 0.2
=> S = kt
= (0.15)(0.2)
= 0.03
Let one pen be
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and one pencil as
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, we can produce two equations in terms of
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and
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
------> Equation 1
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------> Equation 2
We can use either Elimination or Substitution method. Let's try the substitution method
Rearranging equation one to get
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and substitute into equation 2, gives
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



We can use either equation one or equation to work out
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


The price of one pen is $0.85
The price of one pencil is $0.32
Answer:
2700
Step-by-step explanation:
the formula is pi r squared, so if r is 30(diameter/2),
and 2700 is the closest to the answer