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Ede4ka [16]
3 years ago
10

The potential energy, P, in a spring is represented using the formula P = kx2. Lupe uses an equivalent equation, which is solved

for k, to determine the answers to her homework.
Which equation should she use?

k = 2Px2
k = Px2
k = 2p/x2
k = p/2x2
Mathematics
2 answers:
Rus_ich [418]3 years ago
7 0
K = 2p/x^2 You should use this equation.
ella [17]3 years ago
4 0

Original equation is P=kx^{2}

So, kx^{2} =P and

k=\frac{P}{x^{2} }

If we compare this equation with the given options, we can easily find that this matches with the last one k=\frac{p}{2x^{2} } with P = p/2.

Hence, correct option is k=\frac{p}{2x^{2} }.

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Find the measure of e. (Please explain how you got your answer thanks!)
Amanda [17]
Angle e=88 this is because a straight line is always equal to 180. So 180-92 is equal to 88
7 0
3 years ago
89 more than the quotient of a number and 25 is 81.
agasfer [191]
X/25 + 89 = 81
x/25 = 81 - 89
x/25 = - 8
x = -8 * 25
x = - 200

The first one is true
I also believe the 3rd one is true.....u just forgot to put the " / " .
3 0
3 years ago
PLEASE ANSWER ASAP FOR BRAINLEST!!!!!!!!!!!!!!!!!!!!!!!!
madreJ [45]
I’m pretty sure it’s yes. Hopes this helps :)
7 0
3 years ago
Read 2 more answers
Yesterday morning, at 6:00 AM, water started leaking from a tank at a constant rate. The tank contained8,496liters of water at 6
GREYUIT [131]

A linear equation can be written as:

y = a*x + b

where a is the slope and b is the y-intercept.

If we know that the line passes through the points (x₁, y₁) and (x₂, y₂) the slope is:

a = \frac{y_2 - y_1}{x_2 - x_1}

The answers are:

a) y = (-12 L/min)*t + 9,000 L

b) 6,840 L

a) Here we know that we can model this situation with a linear equation, we know that the leak starts at 6:00 am, then we define t = 0 as 6:00 am

We know that at 6:42 am  (at t = 42 mins) the tank has 8,496 liters.

And at 7:15 am (at t = 75 mins) the tank has 8,100 liters.

Then we have two points of the line:

(42 mins, 8,496 liters)

(75 mins, 8,100 liters)

Then the slope is:

a = \frac{8,100 liters - 8,496 liters }{75 mins -42 mins } = -12 L/min

So the line will be something like:

y = (-12 L/min)*t + b

To find the value of b, which is the initial volume of water in the tank, we use the point (75 mins, 8,100 liters)

This means that if t = 75 mins, then we have y = 8,100 L

So we can replace these two on the above equation:

8,100 L = (-12 L/min)*75 mins + b

8,100L = -900L + b

8,100L + 900L = b = 9,000 L

Then the linear equation is:

y = (-12 L/min)*t + 9,000 L

b) Now we want to know how much water is in the tank at 9:00 am.

Notice that 9:00 am is 3 hours after 6:00 am, our t = 0.

Then  9:00am is equivalent to t = 180 mins.

So to know the volume of water that there is in the tank at 9:00 am, we just need to evaluate the linear function at t = 180 mins.

y = (-12 L/min)*180 mins + 9,000 L = 6,840 L

If you want to learn more, you can read:

brainly.com/question/24594539

7 0
3 years ago
Rewrite the following equation in slope intercept 7x + 11y = 10
viva [34]
We can do this by subtracting 7x from both sides, getting us:
11y= -7x+10.
We can then divide both sides by 11, giving our final answer:
y = -7/11x+10/11.
Hope this helped!

4 0
3 years ago
Read 2 more answers
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