I think of a number, double it and add eleven. I get twenty five. Using the statement above form an equation using the letter x!
(Look in pic for more detail)
2 answers:
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Answer:
(a) Set of rational numbers
(b)
Step-by-step explanation:
Solving (a): Set that is closed under subtraction
The solution to this is rational numbers.
For a set of number to be closed under subtraction, the following condition must be true
Where
a, b, c are of the same set.
The above is only true for rational numbers.
e.g.
The operations and the result in the above samples are rational numbers.
Solving (b): Choice not close under addition[See attachment for options]
As stated in (a)
For a set of number to be closed under subtraction, the following condition must be true
Where
a, b, c are of the same set.
In the given options (a) to (d), only
is not close under addition because:
is irrational while
is rational
<em>In other words, they belong to different set</em>
Answer:
5.0 ft-lbf
Step-by-step explanation:
The force is
This force is not a constant force. For a non-constant force, the work done, <em>W</em>, is
with and
the initial and final displacements respectively.
From the question, and
.
Then
Evaluating the indefinite integral,
From the rules of integration,
Returning the limits,
Answer:
the answer is 4,500kgm/s2
Step-by-step explanation:
force= mass × acceleration