Answers
Answer:
Last Choice / D
Step-by-step explanation:
you want to isolate v!
E = 1/2 m v^2
multiply both sides by 2
2E = mv^2
divide both sides by m
2E/m = v^2
square root both sides
v = ±[tex]\sqrt{2E/m}[/tex]
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Answer:
[tex]D.v= \± \sqrt{\frac{2E}{m}}[/tex]
Step-by-step explanation:
[tex]We\ are\ given\ that,\\Kinetic\ Energy\ possessed\ by\ an\ object=\frac{1}{2}mv^2\\Hence,\\E_k=\frac{1}{2}mv^2\\2E=2*\frac{1}{2}mv^2 [Multiplying\ both\ the\ sides\ with\ 2]\\2E=mv^2\\\frac{2E}{m}=\frac{mv^2}{m}[Dividing\ both\ the\ sides\ by\ m]\\\frac{2E}{m}=v^2\\Now,\\As\ v\ could\ be\ positive\ or\ negative\ but\ its\ square(v^2)\ would\ always\ be\ positive.\\[/tex]
[tex](\± v)^2= v^2\\Hence,\\\frac{2E}{m}= (\±v)^2 \\\sqrt{\frac{2E}{m}} = \±v\\Or,\\ v= \± \sqrt{\frac{2E}{m}}[/tex]
Related Questions
Mariana plans to visit an amusement park where she must pay for admission and purchase tickets to go on the rides. Mariana wants to find the total cost for a day at the amusement park. She wrote the equation c = 1.50x + 12 to predict c, the total cost for a day at the amusement park. What could the number 12 represent in Mariana's equation?
Answers
Answer: The number 12 represents admission charge in Mariana's equation.
Step-by-step explanation:
As per given ,
Total cost = ( Charge per ticket) (Number of tickets) + (Admission fees) (i)
For x = Number of tickets, the total cost (c) for a day at the amusement park is given as
[tex]c = 1.50x + 12[/tex] (ii)
Here, 12 = Admission fees [Comparing (i) and (ii)]
Hence, the number 12 represents admission charge in Mariana's equation.
Find the slope of the graph
Answers
Answer:Pick two points on the line and determine their coordinates.
Determine the difference in y-coordinates of these two points (rise).
Determine the difference in x-coordinates for these two points (run).
Divide the difference in y-coordinates by the difference in x-coordinates (rise/run or slope).
Step-by-step explanation:
Nobody answered me all day and I really need help can someone answer this?
Answers
Answer:
reflect over y axis
x+1 y+4
Step-by-step explanation:
Answer:
y axis -2, 4
Step-by-step explanation:
To go bowling, it costs $2 to rent shoes and then $3.25 for each game bowled. Which of the following functions gives the total cost to bowl g games?
Answers
Answer:
2+3.25x
Step-by-step explanation:
What is an equation of the line that passes through the points (5, 8) and (5,3)?
Answers
Answer:
x = 5
Step-by-step explanation:
to find the slope of the line you take the difference of the y-values divided by the difference of the x-values; the denominator results in zero
When the denominator for slope is zero then you know the line will not intersect the y-axis at all and the line will be vertical and intersect the x-axis at the x-coordinate of any known point
any fraction with zero in the denominator is considered to be 'undefined'
any fraction with zero in the numerator is zero
I need help. I can't figure this question out.
Answers
Help plsss I don’t get it
Answers
Answer:
y > 3x - 3
Step-by-step explanation:
First off, to write a linear equation or linear inequality, we use the slope-intercept form: y = mx + b, where m represents the slope of a line, and b represents the y-intercept.
The slope of the line is found using rise/run. The rise, in this case, is 3, and the run is 1. 3/1 is 3. So, we can replace the m in the equation with 3 to get:
y = 3x + b
To find b, simply look for where the line crosses the y-axis (vertical line). In this case, it's -3.
The equation you have now is y = 3x + (-3), which is y = 3x - 3.
You're not done yet. A dotted line like here means a point ON the line is not a solution to the equation, so you have to replace the = with < or >. In this case, the shaded region is everything GREATER THAN -3, meaning you use the > (greater than) symbol.
Your final answer is y > 3x - 3.
Hope this helped!
Answer:
Step-by-step explanation:
The other answer should get the Brainliest. Don't neglect awarding it. They are very good to get.
I'm only going to add a graph for you to see. All it does is point out what < and > mean.
As the other responder said, when the boundary is dotted, it is not included in the shaded part.
Also he pointed the difference between < and >. That is what I wanted to address. It is easy to tell.
< is less than the boundary and it is blue.
> is greater than, and it is green.
if the line is solid, then ≤ or ≥ is used.
please answer/ HELP ME I am using ALL of my points to ask this !!! Write the equation for the quadratic function in the graph.
Answers
Answer:
C matches the graph the best
Step-by-step explanation:
Given x)= 10-2x, find 8(7).
Answers
Step-by-step explanation:
substitute 7 for x so..
(7)=10-2(7)=
10-14
the answer is A. -4
What is the difference between the let statements of consecutive even integers and consecutive odd integers
Answers
Answer and Step-by-step explanation:
The word, "Consecutive" means, "Back-to-back" or "One after the other." Therefore, consider these integers:
1, 2, 3, 4, 5, 6, 7, 8, . . .
If we write down these integers in such a way that only even integers follow back-to-back, we have:
2, 4, 6, 8, . . .
If we write down these integers in such a way that only odd integers follow back-to-back, we have:
1, 3, 5, 7, . . .
Since 2, 4, 6, 8, . . . Are all even integers that follow back-to-back, then this is known of consecutive even integers.
Since 1, 3, 5, 7, . . . Are all odd integers that follow back-to-back, then this is known of consecutive odd integers.
4. Find m_1.
140°
650
Answers
Answer:
∠ 1 = 50°
Step-by-step explanation:
The exterior angle of a triangle is equal to the sum of the 2 opposite interior angles.
140° is an exterior angle of the triangle, thus
90° + ∠ 1 = 140° ( subtract 90° from both sides )
∠ 1 = 50°
Answer:
50 degrees
Step-by-step explanation:
To find the measure of angle 1, you must first find the other unknown angle in the triangle. You can find this through supplementary angles. The bottom angle as well as 140 must be equal to 180 because they are supplementary, so to find it solve 180-140, which is 40. Now two of the angles in the triangle are known, one is 40 and the other is 90 as shown by the square. You know that every angle equals 180 degrees, so to find angle 1 add the known angles and subtract that from 180. 180-(90+40), which equals 50. So m<1=50.
Hello just need help with the last question!
Will mark brainliest :)
Answers
(collect like terms)
9m^2 + 24m = 16
Alyssa invests $2600 in a savings account at 9% simple interest. How much does she have in her account after 3 years?
Answers
Answer:
$3,302
Step-by-step explanation:
9% x 3 (years) = 27%
$2600 x 27% = 702
$2600 + 702 = $3302
because
$2600 x 0.09 x 3 = 702
and
2600 + 702 = $3,302
3x +7=5x-1
X=?
Solve the Question
Answers
3x-5x=-7-1
-2x=-8
x=4
In a survey, 9 out of 10 dentists recommend PurWhite toothpaste for their patients. If 80 dentists were surveyed, how many doctors recommend PurWhite toothpaste?
Answers
Answer:
72 dentists
Step-by-step explanation:
In this case, we can multiply 80 by 9/10 or .9 to get our answer.
If we were to multiply by 9/10 it would look like this:
[tex]80 * \frac{9}{10} \\\frac{720}{10} = 72[/tex]
But, if we were to multiply by .90 (remember that 9/10 = .9) it would look like this:
[tex]80(.90) = 72[/tex]
Therefore, if 9 out of 10 dentists recommended PurWhite toothpaste and 80 were surveyed then 72 out of the 80 would have recommended it.
I hope this helps!!
If you have any questions feel free to ask!
- Kay :)
Fill in the unknown part 2 kg 1 kg how many grams
Answers
Answer:
1kg=1000g
2kg=2×1000g
= 2000
Find the slope for problems 2 and 3.
Answers
Answer:
k
Step-by-step explanation:
2. y= 1/0.5x + 1
3. y= -8/1x + 0
these are the two answers. i hope this helped!
please help me i have a c i need help desperately lol
Answers
Answer:
positive and find the distance..
Step-by-step explanation:
Answer:
1. Find the distance from the number to 0 on the number line
2. positive
Step-by-step explanation:
Which graph represents the inequality? 2x+y>4
Answers
m=-2
b=4
Slope=-2x+4
y<-2x+4
Four times a number plus five times the number is the same as ten more than eight
times the number. Find the number
Answers
Answer:
The number is 10.
Step-by-step explanation:
Given that:
Four times a number plus five times the number is the same as ten more than eight times the number.
Let,
x represent the number.
According to given statement,
4 times the number + 5 times the number = 10 + eight times the number
4x+5x=10+8x
Solving the equation,
9x=10+8x
Subtracting 8x from both sides
9x-8x=10+8x-8x
x=10
Hence,
The number is 10.
I need help with the area and perimeter
Answers
Answer:
Area would be 122.
Perimeter would be 45.
Am I correct? Why am I wrong?
Answers
According to the information the correct match would be: 3 1/2 - This is a rational number, but not an integer, 0.56 - This is a rational number, but not an integer, 5 - This is an integer, Square root of 11 - This is an irrational number, -3 1/2 - This is a rational number, but not an integer.
How to determine the type of number?To determine the type of number, we need to understand the properties of each number.
3 1/2 can be expressed as the fraction 7/2, which is a rational number (a number that can be expressed as a fraction), but not an integer (a whole number without a fractional or decimal part).
0.56 is a rational number as it can be expressed as the fraction 28/50, but it is not an integer as it has a decimal part.
5 is an integer because it is a whole number without any fractional or decimal part.
The square root of 11 is an irrational number since it cannot be expressed as a fraction or a terminating or repeating decimal.
-3 1/2 can be expressed as the fraction -7/2, which is a rational number (a number that can be expressed as a fraction), but it is not an integer (a whole number without a fractional or decimal part).
Learn more about numbers in: https://brainly.com/question/24908711
#SPJ1
List THREE examples of where you would see ADDING or SUBTRACTING DECIMALS in the real world?
Answers
1 Shopping.
2 Jobs.
3 Eating out.
Explanation:
1 When you go shopping you will need to add up your items too see the pricing.
2 Many jobs such as banking you need to know your adding subtracting and decimals.
3 Eating out you need to know how much the price is and how much to tip.
What is the total number of possible 4-letter arrangements of the letters m-a-t-h if each letter is used exactly once in each arrangement?
Answers
9514 1404 393
Answer:
24
Step-by-step explanation:
The number of permutations of 4 items is 4! = 24.
math, maht, mtah, mtha, mhat, mhta,
amth, amht, atmh, athm, ahmt, ahtm,
tmah, tmha, tamh, tahm, thma, tham,
hmat, hmta, hamt, hatm, htma, htam
Is it possible for a triangle to have the side lengths 15, 9, 11? Explain
your reasoning
Answers
Answer:
ANSWER: No; 11. SOLUTION: The sum of the lengths of any two sides of a triangle must be greater than the length of the third side
Step-by-step explanation:
Answer:
yes
Step-by-step explanation:
11 is more than 6 and less than 24
9 is more than 4 and less than 26
15 is more than 2 and less than 20
what property is 2 + (8 + 3) = (2 + 8) + 3
Answers
Answer:
Step-by-step explanation:
The property is commutative property because the numbers can be moved or swapped without making the answer different.
Not sure
What is the value of x?
Answers
Answer:
120
Step-by-step explanation:
gl!!
where do they go and explain why you decided to put it there
Answers
Answer:
0=3/8
1=1 5/8
2= 4/2
i think?
Step-by-step explanation:
3/8 is less than a whole so it is 0
1 5/8 and 4/2 is 2 if simplified and 1 5/8 is less than 2 so 1 5/8 is 1 and 4/2 is 2
The perimeter of a rectangle is equal to 280 meters.
The ratio of its length to its width is 5:2. Find the area
of the rectangle.
Answers
Answer: the area of the rectangle is 4000 meter square.
Step-by-step explanation:
Mark made 23 out of 45 free throws. What is his average number of free throws made? Express your answer as a decimal using bar notation if necessary.
Answers
Answer:
0.51
Step-by-step explanation:
Total free throws taken = 45
Number of successful free throws = 23
Average number of free throws made (x) :
Successful free throws / Numbe rod free throws taken
23 / 45 = 0.511
x = 0.51