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dixks
05.05.2022 •
Mathematics
3. What is the x-coordinate where the
linear equation 10x + 15 will end?
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Ответ:
number 1
You will find that it is easier to do your algebra BEFORE plugging in the numbers. You have KE = 1 2 m v 2 KE=12mv2 then 2 KE = m v 2 2KE=mv2 then 2 KE m = v 2 2KEm=v2 so v = √ 2 KE m v=2KEm Now you can substitute in your numbers and arrive at the numeric solution.
number 2
v = πr²h
Solve for r
We can take the root of both sides, then solve from there
Thus,
The correct answer is option A
number 3
Since
t
is on the right side of the equation, switch the sides so it is on the left side of the equation.
16
t
2
=
d
Divide each term by
16
and simplify.
t
2
=
d
16
Take the square root of both sides of the equation to eliminate the exponent on the left side.
t
=
±
√
d
16
The complete solution is the result of both the positive and negative portions of the solution.
t = √ d 4 , − √ d 4